diff --git a/CHANGELOG b/CHANGELOG
index 92014d0d3..07534dc4f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -8,6 +8,9 @@ Version 2.0.1 (unreleased)
 ==========================
 [https://github.com/OpenSlides/OpenSlides/milestones/2.0.1]
 
+Other:
+- Remove config cache to support multiple threads or processes.
+
 
 Version 2.0 (2016-04-18)
 ========================
diff --git a/openslides/agenda/apps.py b/openslides/agenda/apps.py
index a0c573577..6cd114997 100644
--- a/openslides/agenda/apps.py
+++ b/openslides/agenda/apps.py
@@ -15,16 +15,18 @@ class AgendaAppConfig(AppConfig):
 
         # Import all required stuff.
         from django.db.models.signals import pre_delete, post_save
-        from openslides.core.signals import config_signal
+        from openslides.core.config import config
         from openslides.utils.rest_api import router
+        from .config_variables import get_config_variables
         from .signals import (
-            setup_agenda_config,
             listen_to_related_object_post_delete,
             listen_to_related_object_post_save)
         from .views import ItemViewSet
 
+        # Define config varialbes
+        config.update_config_varialbes(get_config_variables())
+
         # Connect signals.
-        config_signal.connect(setup_agenda_config, dispatch_uid='setup_agenda_config')
         post_save.connect(
             listen_to_related_object_post_save,
             dispatch_uid='listen_to_related_object_post_save')
diff --git a/openslides/agenda/config_variables.py b/openslides/agenda/config_variables.py
new file mode 100644
index 000000000..5b5ba9994
--- /dev/null
+++ b/openslides/agenda/config_variables.py
@@ -0,0 +1,88 @@
+from datetime import datetime
+
+from django.core.exceptions import ValidationError as DjangoValidationError
+from django.core.validators import MaxLengthValidator, MinValueValidator
+from django.utils.translation import ugettext as _
+from django.utils.translation import ugettext_lazy
+
+from openslides.core.config import ConfigVariable
+
+
+def validate_start_time(value):
+    try:
+        datetime.strptime(value, '%d.%m.%Y %H:%M')
+    except ValueError:
+        raise DjangoValidationError(_('Invalid input.'))
+
+
+def get_config_variables():
+    """
+    Generator which yields all config variables of this app.
+
+    It has to be evaluated during app loading (see apps.py).
+    """
+    yield ConfigVariable(
+        name='agenda_number_prefix',
+        default_value='',
+        label=ugettext_lazy('Numbering prefix for agenda items'),
+        help_text=ugettext_lazy('This prefix will be set if you run the automatic agenda numbering.'),
+        weight=210,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('General'),
+        validators=(MaxLengthValidator(20),))
+
+    yield ConfigVariable(
+        name='agenda_numeral_system',
+        default_value='arabic',
+        input_type='choice',
+        label=ugettext_lazy('Numeral system for agenda items'),
+        choices=(
+            {'value': 'arabic', 'display_name': ugettext_lazy('Arabic')},
+            {'value': 'roman', 'display_name': ugettext_lazy('Roman')}),
+        weight=215,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('General'))
+
+    # TODO: Use an input type with generic datetime support.
+    yield ConfigVariable(
+        name='agenda_start_event_date_time',
+        default_value='',
+        label=ugettext_lazy('Begin of event'),
+        help_text=ugettext_lazy('Input format: DD.MM.YYYY HH:MM'),
+        weight=220,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('General'),
+        validators=(validate_start_time,))
+
+    # List of speakers
+
+    yield ConfigVariable(
+        name='agenda_show_last_speakers',
+        default_value=1,
+        input_type='integer',
+        label=ugettext_lazy('Number of last speakers to be shown on the projector'),
+        weight=230,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('List of speakers'),
+        validators=(MinValueValidator(0),))
+
+    yield ConfigVariable(
+        name='agenda_countdown_warning_time',
+        default_value=0,
+        input_type='integer',
+        label=ugettext_lazy('Show orange countdown in the last x seconds of speaking time'),
+        help_text=ugettext_lazy('Enter duration in seconds. Choose 0 to disable warning color.'),
+        weight=235,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('List of speakers'),
+        validators=(MinValueValidator(0),))
+
+    yield ConfigVariable(
+        name='agenda_couple_countdown_and_speakers',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Couple countdown with the list of speakers'),
+        help_text=ugettext_lazy('[Begin speech] starts the countdown, [End speech] stops the countdown.'),
+        weight=240,
+        group=ugettext_lazy('Agenda'),
+        subgroup=ugettext_lazy('List of speakers'))
diff --git a/openslides/agenda/signals.py b/openslides/agenda/signals.py
index be46e16f5..ff8694774 100644
--- a/openslides/agenda/signals.py
+++ b/openslides/agenda/signals.py
@@ -1,97 +1,10 @@
-from datetime import datetime
-
 from django.contrib.contenttypes.models import ContentType
-from django.core.exceptions import ValidationError as DjangoValidationError
-from django.core.validators import MaxLengthValidator, MinValueValidator
-from django.utils.translation import ugettext as _
-from django.utils.translation import ugettext_lazy
 
-from openslides.core.config import ConfigVariable
 from openslides.utils.autoupdate import inform_changed_data
 
 from .models import Item
 
 
-def validate_start_time(value):
-    try:
-        datetime.strptime(value, '%d.%m.%Y %H:%M')
-    except ValueError:
-        raise DjangoValidationError(_('Invalid input.'))
-
-
-def setup_agenda_config(sender, **kwargs):
-    """
-    Receiver function to setup all agenda config variables.
-    This function connected to the signal openslides.core.signals.config_signal
-    during app loading.
-    """
-    yield ConfigVariable(
-        name='agenda_number_prefix',
-        default_value='',
-        label=ugettext_lazy('Numbering prefix for agenda items'),
-        help_text=ugettext_lazy('This prefix will be set if you run the automatic agenda numbering.'),
-        weight=210,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('General'),
-        validators=(MaxLengthValidator(20),))
-
-    yield ConfigVariable(
-        name='agenda_numeral_system',
-        default_value='arabic',
-        input_type='choice',
-        label=ugettext_lazy('Numeral system for agenda items'),
-        choices=(
-            {'value': 'arabic', 'display_name': ugettext_lazy('Arabic')},
-            {'value': 'roman', 'display_name': ugettext_lazy('Roman')}),
-        weight=215,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('General'))
-
-    # TODO: Use an input type with generic datetime support.
-    yield ConfigVariable(
-        name='agenda_start_event_date_time',
-        default_value='',
-        label=ugettext_lazy('Begin of event'),
-        help_text=ugettext_lazy('Input format: DD.MM.YYYY HH:MM'),
-        weight=220,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('General'),
-        validators=(validate_start_time,))
-
-    # List of speakers
-
-    yield ConfigVariable(
-        name='agenda_show_last_speakers',
-        default_value=1,
-        input_type='integer',
-        label=ugettext_lazy('Number of last speakers to be shown on the projector'),
-        weight=230,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('List of speakers'),
-        validators=(MinValueValidator(0),))
-
-    yield ConfigVariable(
-        name='agenda_countdown_warning_time',
-        default_value=0,
-        input_type='integer',
-        label=ugettext_lazy('Show orange countdown in the last x seconds of speaking time'),
-        help_text=ugettext_lazy('Enter duration in seconds. Choose 0 to disable warning color.'),
-        weight=235,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('List of speakers'),
-        validators=(MinValueValidator(0),))
-
-    yield ConfigVariable(
-        name='agenda_couple_countdown_and_speakers',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Couple countdown with the list of speakers'),
-        help_text=ugettext_lazy('[Begin speech] starts the countdown, [End speech] stops the countdown.'),
-        weight=240,
-        group=ugettext_lazy('Agenda'),
-        subgroup=ugettext_lazy('List of speakers'))
-
-
 def listen_to_related_object_post_save(sender, instance, created, **kwargs):
     """
     Receiver function to create agenda items. It is connected to the signal
diff --git a/openslides/assignments/apps.py b/openslides/assignments/apps.py
index 67a455495..7228e4f89 100644
--- a/openslides/assignments/apps.py
+++ b/openslides/assignments/apps.py
@@ -14,13 +14,13 @@ class AssignmentsAppConfig(AppConfig):
         from . import projector  # noqa
 
         # Import all required stuff.
-        from openslides.core.signals import config_signal
+        from openslides.core.config import config
         from openslides.utils.rest_api import router
-        from .signals import setup_assignment_config
+        from .config_variables import get_config_variables
         from .views import AssignmentViewSet, AssignmentPollViewSet
 
-        # Connect signals.
-        config_signal.connect(setup_assignment_config, dispatch_uid='setup_assignment_config')
+        # Define config variables
+        config.update_config_varialbes(get_config_variables())
 
         # Register viewsets.
         router.register(self.get_model('Assignment').get_collection_string(), AssignmentViewSet)
diff --git a/openslides/assignments/signals.py b/openslides/assignments/config_variables.py
similarity index 92%
rename from openslides/assignments/signals.py
rename to openslides/assignments/config_variables.py
index 17f920948..e4e3412b3 100644
--- a/openslides/assignments/signals.py
+++ b/openslides/assignments/config_variables.py
@@ -6,15 +6,14 @@ from openslides.core.config import ConfigVariable
 from openslides.poll.models import PERCENT_BASE_CHOICES
 
 
-def setup_assignment_config(sender, **kwargs):
+def get_config_variables():
     """
-    Receiver function to setup all assignment config variables. They are
-    grouped in 'Ballot and ballot papers' and 'PDF'. This function is
-    connected to the signal openslides.core.signals.config_signal during
-    app loading.
+    Generator which yields all config variables of this app.
+
+    They are grouped in 'Ballot and ballot papers' and 'PDF'. The generator has
+    to be evaluated during app loading (see apps.py).
     """
     # Ballot and ballot papers
-
     yield ConfigVariable(
         name='assignments_poll_vote_values',
         default_value='auto',
diff --git a/openslides/core/apps.py b/openslides/core/apps.py
index 456d08552..569c3d72c 100644
--- a/openslides/core/apps.py
+++ b/openslides/core/apps.py
@@ -15,11 +15,13 @@ class CoreAppConfig(AppConfig):
 
         # Import all required stuff.
         from django.db.models import signals
-        from openslides.core.signals import config_signal, post_permission_creation
+        from openslides.core.config import config
+        from openslides.core.signals import post_permission_creation
         from openslides.utils.autoupdate import inform_changed_data_receiver, inform_deleted_data_receiver
         from openslides.utils.rest_api import router
         from openslides.utils.search import index_add_instance, index_del_instance
-        from .signals import delete_django_app_permissions, setup_general_config
+        from .config_variables import get_config_variables
+        from .signals import delete_django_app_permissions
         from .views import (
             ChatMessageViewSet,
             ConfigViewSet,
@@ -28,10 +30,10 @@ class CoreAppConfig(AppConfig):
             TagViewSet,
         )
 
+        # Define config variables
+        config.update_config_varialbes(get_config_variables())
+
         # Connect signals.
-        config_signal.connect(
-            setup_general_config,
-            dispatch_uid='setup_general_config')
         post_permission_creation.connect(
             delete_django_app_permissions,
             dispatch_uid='delete_django_app_permissions')
diff --git a/openslides/core/config.py b/openslides/core/config.py
index d4d52113d..b0ad57e4f 100644
--- a/openslides/core/config.py
+++ b/openslides/core/config.py
@@ -19,33 +19,35 @@ class ConfigHandler:
     object. To get a config variable use x = config[...], to set it use
     config[...] = x.
     """
+
+    def __init__(self):
+        # Dict, that keeps all ConfigVariable objects. Has to be set at statup.
+        # See the run method in openslides.core.apps.
+        self.config_variables = {}
+
     def __getitem__(self, key):
         """
-        Returns the value of the config variable. Builds the cache if it
-        does not exist.
+        Returns the value of the config variable. Returns the default value, if
+        not value exists in the database.
         """
         try:
-            return self._cache[key]
+            default_value = self.config_variables[key].default_value
         except KeyError:
-            raise ConfigNotFound(_('The config variable %s was not found.') % key)
-        except AttributeError:
-            self.setup_cache()
-            return self[key]
+            raise ConfigNotFound(_('The config variable {} was not found.').format(key))
 
-    def setup_cache(self):
-        """
-        Creates a cache of all config variables with their current value.
-        """
-        self._cache = {}
-        for key, config_variable in self.get_config_variables().items():
-            self._cache[key] = config_variable.default_value
-        for config_object in ConfigStore.objects.all():
-            self._cache[config_object.key] = config_object.value
+        try:
+            db_value = ConfigStore.objects.get(key=key)
+        except ConfigStore.DoesNotExist:
+            return default_value
+        return db_value.value
 
     def __contains__(self, key):
+        """
+        Returns True, if the config varialbe exists.
+        """
         try:
-            config[key]
-        except ConfigNotFound:
+            self.config_variables[key]
+        except KeyError:
             return False
         else:
             return True
@@ -56,9 +58,9 @@ class ConfigHandler:
         """
         # Check if the variable is defined.
         try:
-            config_variable = config.get_config_variables()[key]
+            config_variable = self.config_variables[key]
         except KeyError:
-            raise ConfigNotFound(_('The config variable %s was not found.') % key)
+            raise ConfigNotFound(_('The config variable {} was not found.').format(key))
 
         # Validate datatype and run validators.
         expected_type = INPUT_TYPE_MAPPING[config_variable.input_type]
@@ -69,8 +71,15 @@ class ConfigHandler:
         except ValueError:
             raise ConfigError(_('Wrong datatype. Expected %(expected_type)s, got %(got_type)s.') % {
                 'expected_type': expected_type, 'got_type': type(value)})
-        if config_variable.input_type == 'choice' and value not in map(lambda choice: choice['value'], config_variable.choices):
-            raise ConfigError(_('Invalid input. Choice does not match.'))
+
+        if config_variable.input_type == 'choice':
+            # Choices can be a callable. In this case call it at this place
+            if callable(config_variable.choices):
+                choices = config_variable.choices()
+            else:
+                choices = config_variable.choices
+            if value not in map(lambda choice: choice['value'], choices):
+                raise ConfigError(_('Invalid input. Choice does not match.'))
         for validator in config_variable.validators:
             try:
                 validator(value)
@@ -78,50 +87,45 @@ class ConfigHandler:
                 raise ConfigError(e.messages[0])
 
         # Save the new value to the database.
-        config_store, created = ConfigStore.objects.get_or_create(key=key, defaults={'value': value})
-        if not created:
-            config_store.value = value
-            config_store.save()
-
-        # Update cache.
-        if hasattr(self, '_cache'):
-            self._cache[key] = value
+        ConfigStore.objects.update_or_create(key=key, defaults={'value': value})
 
         # Call on_change callback.
         if config_variable.on_change:
             config_variable.on_change()
 
+    def update_config_varialbes(self, items):
+        """
+        Updates the config_variables dict.
+
+        items has to be an iterator over ConfigVariable objects.
+        """
+        new_items = dict((variable.name, variable) for variable in items)
+        # Check that all ConfigVariables are unique. So no key from items can
+        # be in already in self.config_variables
+        for key in new_items.keys():
+            if key in self.config_variables:
+                raise ConfigError(_('Too many values for config variable {} found.').format(key))
+
+        self.config_variables.update(new_items)
+
     def items(self):
         """
-        Returns key-value pairs of all config variables.
+        Iterates over key-value pairs of all config variables.
         """
-        if not hasattr(self, '_cache'):
-            self.setup_cache()
-        return self._cache.items()
+        # Create a dict with the default values of each ConfigVariable
+        config_items = dict((key, variable.default_value) for key, variable in self.config_variables.items())
 
-    def get_config_variables(self):
-        """
-        Returns a dictionary with all ConfigVariable instances of all
-        signal receivers. The key is the name of the config variable.
-        """
-        # config_signal can not be imported at global space, because
-        # core.signals imports this file
-        from .signals import config_signal
-
-        result = {}
-        for receiver, config_collection in config_signal.send(sender='get_config_variables'):
-            for config_variable in config_collection:
-                if config_variable.name in result:
-                    raise ConfigError(_('Too many values for config variable %s found.') % config_variable.name)
-                result[config_variable.name] = config_variable
-        return result
+        # Update the dict with all values, which are in the db
+        for db_value in ConfigStore.objects.all():
+            config_items[db_value.key] = db_value.value
+        return config_items.items()
 
     def get_all_translatable(self):
         """
         Generator to get all config variables as strings when their values are
         intended to be translated.
         """
-        for config_variable in self.get_config_variables().values():
+        for config_variable in self.config_variables.values():
             if config_variable.translatable:
                 yield config_variable.name
 
diff --git a/openslides/core/config_variables.py b/openslides/core/config_variables.py
new file mode 100644
index 000000000..affaeee7b
--- /dev/null
+++ b/openslides/core/config_variables.py
@@ -0,0 +1,160 @@
+from django.core.validators import MaxLengthValidator
+from django.utils.translation import ugettext as _
+from django.utils.translation import ugettext_lazy
+
+from openslides.core.config import ConfigVariable
+
+
+def get_config_variables():
+    """
+    Generator which yields all config variables of this app.
+
+    There are two main groups: 'General' and 'Projector'. The group 'General'
+    has subgroups. The generator has to be evaluated during app loading
+    (see apps.py).
+    """
+    yield ConfigVariable(
+        name='general_event_name',
+        default_value='OpenSlides',
+        label=ugettext_lazy('Event name'),
+        weight=110,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'),
+        validators=(MaxLengthValidator(50),))
+
+    yield ConfigVariable(
+        name='general_event_description',
+        default_value=_('Presentation and assembly system'),
+        label=ugettext_lazy('Short description of event'),
+        weight=115,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'),
+        validators=(MaxLengthValidator(100),),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='general_event_date',
+        default_value='',
+        label=ugettext_lazy('Event date'),
+        weight=120,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'))
+
+    yield ConfigVariable(
+        name='general_event_location',
+        default_value='',
+        label=ugettext_lazy('Event location'),
+        weight=125,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'))
+
+    yield ConfigVariable(
+        name='general_event_organizer',
+        default_value='',
+        label=ugettext_lazy('Event organizer'),
+        weight=130,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'))
+
+    yield ConfigVariable(
+        name='general_event_legal_notice',
+        default_value=_(
+            '<a href="http://www.openslides.org">OpenSlides</a> is a free web based '
+            'presentation and assembly system for visualizing and controlling agenda, '
+            'motions and elections of an assembly.'),
+        input_type='text',
+        label=ugettext_lazy('Legal notice'),
+        weight=132,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='general_event_welcome_title',
+        default_value=_('Welcome to OpenSlides'),
+        label=ugettext_lazy('Front page title'),
+        weight=134,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='general_event_welcome_text',
+        default_value=_('[Space for your welcome text.]'),
+        input_type='text',
+        label=ugettext_lazy('Front page text'),
+        weight=136,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('Event'),
+        translatable=True)
+
+    # General System
+
+    yield ConfigVariable(
+        name='general_system_enable_anonymous',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Allow access for anonymous guest users'),
+        weight=138,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('System'))
+
+    yield ConfigVariable(
+        name='general_login_info_text',
+        default_value='',
+        label=ugettext_lazy('Show this text on the login page.'),
+        weight=140,
+        group=ugettext_lazy('General'),
+        subgroup=ugettext_lazy('System'))
+
+    # Projector
+
+    yield ConfigVariable(
+        name='projector_enable_logo',
+        default_value=True,
+        input_type='boolean',
+        label=ugettext_lazy('Show logo on projector'),
+        help_text=ugettext_lazy(
+            'You can replace the logo. Just copy a file to '
+            '"static/img/logo-projector.png" in your OpenSlides data path.'),
+        weight=150,
+        group=ugettext_lazy('Projector'))
+
+    yield ConfigVariable(
+        name='projector_enable_title',
+        default_value=True,
+        input_type='boolean',
+        label=ugettext_lazy('Show title and description of event on projector'),
+        weight=155,
+        group=ugettext_lazy('Projector'))
+
+    yield ConfigVariable(
+        name='projector_header_backgroundcolor',
+        default_value='#317796',
+        input_type='colorpicker',
+        label=ugettext_lazy('Background color of projector header and footer'),
+        weight=160,
+        group=ugettext_lazy('Projector'))
+
+    yield ConfigVariable(
+        name='projector_header_fontcolor',
+        default_value='#F5F5F5',
+        input_type='colorpicker',
+        label=ugettext_lazy('Font color of projector header and footer'),
+        weight=165,
+        group=ugettext_lazy('Projector'))
+
+    yield ConfigVariable(
+        name='projector_h1_fontcolor',
+        default_value='#317796',
+        input_type='colorpicker',
+        label=ugettext_lazy('Font color of projector headline'),
+        weight=170,
+        group=ugettext_lazy('Projector'))
+
+    yield ConfigVariable(
+        name='projector_default_countdown',
+        default_value=60,
+        label=ugettext_lazy('Default countdown'),
+        weight=185,
+        group=ugettext_lazy('Projector'))
diff --git a/openslides/core/middleware.py b/openslides/core/middleware.py
deleted file mode 100644
index d4bc03a21..000000000
--- a/openslides/core/middleware.py
+++ /dev/null
@@ -1,9 +0,0 @@
-from .config import config
-
-
-class ConfigCacheMiddleware(object):
-    """
-    Middleware to refresh the config cache before processing any view.
-    """
-    def process_request(self, request):
-        config.setup_cache()
diff --git a/openslides/core/signals.py b/openslides/core/signals.py
index 2f8bc101d..dc4490f5c 100644
--- a/openslides/core/signals.py
+++ b/openslides/core/signals.py
@@ -1,12 +1,7 @@
 from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
-from django.core.validators import MaxLengthValidator
 from django.db.models import Q
 from django.dispatch import Signal
-from django.utils.translation import ugettext as _
-from django.utils.translation import ugettext_lazy
-
-from openslides.core.config import ConfigVariable
 
 # This signal is sent when the migrate command is done. That means it is sent
 # after post_migrate sending and creating all Permission objects. Don't use it
@@ -25,163 +20,3 @@ def delete_django_app_permissions(sender, **kwargs):
         Q(app_label='sessions'))
     for permission in Permission.objects.filter(content_type__in=contenttypes):
         permission.delete()
-
-
-def setup_general_config(sender, **kwargs):
-    """
-    Receiver function to setup general config variables for OpenSlides.
-    There are two main groups: 'General' and 'Projector'. The group
-    'General' has subgroups. This function is connected to the signal
-    openslides.core.signals.config_signal during app loading.
-    """
-    # General Event
-
-    yield ConfigVariable(
-        name='general_event_name',
-        default_value='OpenSlides',
-        label=ugettext_lazy('Event name'),
-        weight=110,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'),
-        validators=(MaxLengthValidator(50),))
-
-    yield ConfigVariable(
-        name='general_event_description',
-        default_value=_('Presentation and assembly system'),
-        label=ugettext_lazy('Short description of event'),
-        weight=115,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'),
-        validators=(MaxLengthValidator(100),),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='general_event_date',
-        default_value='',
-        label=ugettext_lazy('Event date'),
-        weight=120,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'))
-
-    yield ConfigVariable(
-        name='general_event_location',
-        default_value='',
-        label=ugettext_lazy('Event location'),
-        weight=125,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'))
-
-    yield ConfigVariable(
-        name='general_event_organizer',
-        default_value='',
-        label=ugettext_lazy('Event organizer'),
-        weight=130,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'))
-
-    yield ConfigVariable(
-        name='general_event_legal_notice',
-        default_value=_(
-            '<a href="http://www.openslides.org">OpenSlides</a> is a free web based '
-            'presentation and assembly system for visualizing and controlling agenda, '
-            'motions and elections of an assembly.'),
-        input_type='text',
-        label=ugettext_lazy('Legal notice'),
-        weight=132,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='general_event_welcome_title',
-        default_value=_('Welcome to OpenSlides'),
-        label=ugettext_lazy('Front page title'),
-        weight=134,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='general_event_welcome_text',
-        default_value=_('[Space for your welcome text.]'),
-        input_type='text',
-        label=ugettext_lazy('Front page text'),
-        weight=136,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('Event'),
-        translatable=True)
-
-    # General System
-
-    yield ConfigVariable(
-        name='general_system_enable_anonymous',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Allow access for anonymous guest users'),
-        weight=138,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('System'))
-
-    yield ConfigVariable(
-        name='general_login_info_text',
-        default_value='',
-        label=ugettext_lazy('Show this text on the login page.'),
-        weight=140,
-        group=ugettext_lazy('General'),
-        subgroup=ugettext_lazy('System'))
-
-    # Projector
-
-    yield ConfigVariable(
-        name='projector_enable_logo',
-        default_value=True,
-        input_type='boolean',
-        label=ugettext_lazy('Show logo on projector'),
-        help_text=ugettext_lazy(
-            'You can replace the logo. Just copy a file to '
-            '"static/img/logo-projector.png" in your OpenSlides data path.'),
-        weight=150,
-        group=ugettext_lazy('Projector'))
-
-    yield ConfigVariable(
-        name='projector_enable_title',
-        default_value=True,
-        input_type='boolean',
-        label=ugettext_lazy('Show title and description of event on projector'),
-        weight=155,
-        group=ugettext_lazy('Projector'))
-
-    yield ConfigVariable(
-        name='projector_header_backgroundcolor',
-        default_value='#317796',
-        input_type='colorpicker',
-        label=ugettext_lazy('Background color of projector header and footer'),
-        weight=160,
-        group=ugettext_lazy('Projector'))
-
-    yield ConfigVariable(
-        name='projector_header_fontcolor',
-        default_value='#F5F5F5',
-        input_type='colorpicker',
-        label=ugettext_lazy('Font color of projector header and footer'),
-        weight=165,
-        group=ugettext_lazy('Projector'))
-
-    yield ConfigVariable(
-        name='projector_h1_fontcolor',
-        default_value='#317796',
-        input_type='colorpicker',
-        label=ugettext_lazy('Font color of projector headline'),
-        weight=170,
-        group=ugettext_lazy('Projector'))
-
-    yield ConfigVariable(
-        name='projector_default_countdown',
-        default_value=60,
-        label=ugettext_lazy('Default countdown'),
-        weight=185,
-        group=ugettext_lazy('Projector'))
-
-
-config_signal = Signal(providing_args=[])
-"""Signal to get all config tabs from all apps."""
diff --git a/openslides/core/views.py b/openslides/core/views.py
index b76183d1b..ac6ee5412 100644
--- a/openslides/core/views.py
+++ b/openslides/core/views.py
@@ -415,12 +415,9 @@ class ConfigMetadata(SimpleMetadata):
     Custom metadata class to add config info to responses on OPTIONS requests.
     """
     def determine_metadata(self, request, view):
-        # Sort config variables by weight.
-        config_variables = sorted(config.get_config_variables().values(), key=attrgetter('weight'))
-
         # Build tree.
         config_groups = []
-        for config_variable in config_variables:
+        for config_variable in sorted(config.config_variables.values(), key=attrgetter('weight')):
             if config_variable.is_hidden():
                 # Skip hidden config variables. Do not even check groups and subgroups.
                 continue
diff --git a/openslides/global_settings.py b/openslides/global_settings.py
index f913e79ab..9b6ba6090 100644
--- a/openslides/global_settings.py
+++ b/openslides/global_settings.py
@@ -60,7 +60,6 @@ MIDDLEWARE_CLASSES = (
     'django.middleware.csrf.CsrfViewMiddleware',
     'openslides.users.auth.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
-    'openslides.core.middleware.ConfigCacheMiddleware',
 )
 
 ROOT_URLCONF = 'openslides.urls'
diff --git a/openslides/motions/apps.py b/openslides/motions/apps.py
index 582090fb5..38ad8e34f 100644
--- a/openslides/motions/apps.py
+++ b/openslides/motions/apps.py
@@ -15,13 +15,16 @@ class MotionsAppConfig(AppConfig):
         from . import projector  # noqa
 
         # Import all required stuff.
-        from openslides.core.signals import config_signal
+        from openslides.core.config import config
         from openslides.utils.rest_api import router
-        from .signals import create_builtin_workflows, setup_motion_config
+        from .config_variables import get_config_variables
+        from .signals import create_builtin_workflows
         from .views import CategoryViewSet, MotionViewSet, MotionPollViewSet, WorkflowViewSet
 
+        # Define config varialbes
+        config.update_config_varialbes(get_config_variables())
+
         # Connect signals.
-        config_signal.connect(setup_motion_config, dispatch_uid='setup_motion_config')
         post_migrate.connect(create_builtin_workflows, dispatch_uid='motion_create_builtin_workflows')
 
         # Register viewsets.
diff --git a/openslides/motions/config_variables.py b/openslides/motions/config_variables.py
new file mode 100644
index 000000000..74cf3dc8c
--- /dev/null
+++ b/openslides/motions/config_variables.py
@@ -0,0 +1,183 @@
+from django.core.validators import MinValueValidator
+from django.utils.translation import ugettext as _
+from django.utils.translation import pgettext, ugettext_lazy
+
+from openslides.core.config import ConfigVariable
+from openslides.poll.models import PERCENT_BASE_CHOICES
+
+from .models import Workflow
+
+
+def get_workflow_choices():
+    """
+    Returns a list of all workflows to be used as choices for the config variable
+    'motions_workflow'. Each list item contains the pk and the display name.
+    """
+    return [{'value': str(workflow.pk), 'display_name': ugettext_lazy(workflow.name)}
+            for workflow in Workflow.objects.all()]
+
+
+def get_config_variables():
+    """
+    Generator which yields all config variables of this app.
+
+    They are grouped in 'General', 'Amendments', 'Supporters', 'Voting and ballot
+    papers' and 'PDF'. The generator has to be evaluated during app loading
+    (see apps.py).
+    """
+    # General
+    yield ConfigVariable(
+        name='motions_workflow',
+        default_value='1',
+        input_type='choice',
+        label=ugettext_lazy('Workflow of new motions'),
+        choices=get_workflow_choices,
+        weight=310,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('General'))
+
+    yield ConfigVariable(
+        name='motions_identifier',
+        default_value='per_category',
+        input_type='choice',
+        label=ugettext_lazy('Identifier'),
+        choices=(
+            {'value': 'per_category', 'display_name': ugettext_lazy('Numbered per category')},
+            {'value': 'serially_numbered', 'display_name': ugettext_lazy('Serially numbered')},
+            {'value': 'manually', 'display_name': ugettext_lazy('Set it manually')}),
+        weight=315,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('General'))
+
+    yield ConfigVariable(
+        name='motions_preamble',
+        default_value=_('The assembly may decide,'),
+        label=ugettext_lazy('Motion preamble'),
+        weight=320,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('General'),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='motions_stop_submitting',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Stop submitting new motions by non-staff users'),
+        weight=325,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('General'))
+
+    yield ConfigVariable(
+        name='motions_allow_disable_versioning',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Allow to disable versioning'),
+        weight=330,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('General'))
+
+    # Amendments
+    # Amendments currently not implemented. (TODO: Implement it like in OpenSlides 1.7.)
+    yield ConfigVariable(
+        name='motions_amendments_enabled',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Activate amendments'),
+        hidden=True,
+        weight=335,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Amendments'))
+
+    yield ConfigVariable(
+        name='motions_amendments_prefix',
+        default_value=pgettext('Prefix for the identifier for amendments', 'A'),
+        label=ugettext_lazy('Prefix for the identifier for amendments'),
+        hidden=True,
+        weight=340,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Amendments'))
+
+    # Supporters
+
+    yield ConfigVariable(
+        name='motions_min_supporters',
+        default_value=0,
+        input_type='integer',
+        label=ugettext_lazy('Number of (minimum) required supporters for a motion'),
+        help_text=ugettext_lazy('Choose 0 to disable the supporting system.'),
+        weight=345,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Supporters'),
+        validators=(MinValueValidator(0),))
+
+    yield ConfigVariable(
+        name='motions_remove_supporters',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Remove all supporters of a motion if a submitter edits his motion in early state'),
+        weight=350,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Supporters'))
+
+    # Voting and ballot papers
+
+    yield ConfigVariable(
+        name='motions_poll_100_percent_base',
+        default_value='WITHOUT_INVALID',
+        input_type='choice',
+        label=ugettext_lazy('The 100 % base of a voting result consists of'),
+        choices=PERCENT_BASE_CHOICES,
+        weight=355,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Voting and ballot papers'))
+
+    yield ConfigVariable(
+        name='motions_pdf_ballot_papers_selection',
+        default_value='CUSTOM_NUMBER',
+        input_type='choice',
+        label=ugettext_lazy('Number of ballot papers (selection)'),
+        choices=(
+            {'value': 'NUMBER_OF_DELEGATES', 'display_name': ugettext_lazy('Number of all delegates')},
+            {'value': 'NUMBER_OF_ALL_PARTICIPANTS', 'display_name': ugettext_lazy('Number of all participants')},
+            {'value': 'CUSTOM_NUMBER', 'display_name': ugettext_lazy('Use the following custom number')}),
+        weight=360,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Voting and ballot papers'))
+
+    yield ConfigVariable(
+        name='motions_pdf_ballot_papers_number',
+        default_value=8,
+        input_type='integer',
+        label=ugettext_lazy('Custom number of ballot papers'),
+        weight=365,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('Voting and ballot papers'),
+        validators=(MinValueValidator(1),))
+
+    # PDF
+
+    yield ConfigVariable(
+        name='motions_pdf_title',
+        default_value=_('Motions'),
+        label=ugettext_lazy('Title for PDF document (all motions)'),
+        weight=370,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('PDF'),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='motions_pdf_preamble',
+        default_value='',
+        label=ugettext_lazy('Preamble text for PDF document (all motions)'),
+        weight=375,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('PDF'))
+
+    yield ConfigVariable(
+        name='motions_pdf_paragraph_numbering',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Show paragraph numbering (only in PDF)'),
+        weight=380,
+        group=ugettext_lazy('Motions'),
+        subgroup=ugettext_lazy('PDF'))
diff --git a/openslides/motions/signals.py b/openslides/motions/signals.py
index 782c94e8e..15cc0fa78 100644
--- a/openslides/motions/signals.py
+++ b/openslides/motions/signals.py
@@ -1,179 +1,8 @@
-from django.core.validators import MinValueValidator
-from django.utils.translation import ugettext as _
-from django.utils.translation import pgettext, ugettext_lazy, ugettext_noop
-
-from openslides.core.config import ConfigVariable
-from openslides.poll.models import PERCENT_BASE_CHOICES
+from django.utils.translation import ugettext_noop
 
 from .models import State, Workflow
 
 
-def setup_motion_config(sender, **kwargs):
-    """
-    Receiver function to setup all motion config variables. They are
-    grouped in 'General', 'Amendments', 'Supporters', 'Voting and ballot
-    papers' and 'PDF'. This function connected to the signal
-    openslides.core.signals.config_signal during app loading.
-    """
-    # General
-
-    yield ConfigVariable(
-        name='motions_workflow',
-        default_value='1',
-        input_type='choice',
-        label=ugettext_lazy('Workflow of new motions'),
-        choices=({'value': str(workflow.pk), 'display_name': ugettext_lazy(workflow.name)} for workflow in Workflow.objects.all()),
-        weight=310,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('General'))
-
-    yield ConfigVariable(
-        name='motions_identifier',
-        default_value='per_category',
-        input_type='choice',
-        label=ugettext_lazy('Identifier'),
-        choices=(
-            {'value': 'per_category', 'display_name': ugettext_lazy('Numbered per category')},
-            {'value': 'serially_numbered', 'display_name': ugettext_lazy('Serially numbered')},
-            {'value': 'manually', 'display_name': ugettext_lazy('Set it manually')}),
-        weight=315,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('General'))
-
-    yield ConfigVariable(
-        name='motions_preamble',
-        default_value=_('The assembly may decide,'),
-        label=ugettext_lazy('Motion preamble'),
-        weight=320,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('General'),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='motions_stop_submitting',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Stop submitting new motions by non-staff users'),
-        weight=325,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('General'))
-
-    yield ConfigVariable(
-        name='motions_allow_disable_versioning',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Allow to disable versioning'),
-        weight=330,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('General'))
-
-    # Amendments
-    # Amendments currently not implemented. (TODO: Implement it like in OpenSlides 1.7.)
-    yield ConfigVariable(
-        name='motions_amendments_enabled',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Activate amendments'),
-        hidden=True,
-        weight=335,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Amendments'))
-
-    yield ConfigVariable(
-        name='motions_amendments_prefix',
-        default_value=pgettext('Prefix for the identifier for amendments', 'A'),
-        label=ugettext_lazy('Prefix for the identifier for amendments'),
-        hidden=True,
-        weight=340,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Amendments'))
-
-    # Supporters
-
-    yield ConfigVariable(
-        name='motions_min_supporters',
-        default_value=0,
-        input_type='integer',
-        label=ugettext_lazy('Number of (minimum) required supporters for a motion'),
-        help_text=ugettext_lazy('Choose 0 to disable the supporting system.'),
-        weight=345,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Supporters'),
-        validators=(MinValueValidator(0),))
-
-    yield ConfigVariable(
-        name='motions_remove_supporters',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Remove all supporters of a motion if a submitter edits his motion in early state'),
-        weight=350,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Supporters'))
-
-    # Voting and ballot papers
-
-    yield ConfigVariable(
-        name='motions_poll_100_percent_base',
-        default_value='WITHOUT_INVALID',
-        input_type='choice',
-        label=ugettext_lazy('The 100 % base of a voting result consists of'),
-        choices=PERCENT_BASE_CHOICES,
-        weight=355,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Voting and ballot papers'))
-
-    yield ConfigVariable(
-        name='motions_pdf_ballot_papers_selection',
-        default_value='CUSTOM_NUMBER',
-        input_type='choice',
-        label=ugettext_lazy('Number of ballot papers (selection)'),
-        choices=(
-            {'value': 'NUMBER_OF_DELEGATES', 'display_name': ugettext_lazy('Number of all delegates')},
-            {'value': 'NUMBER_OF_ALL_PARTICIPANTS', 'display_name': ugettext_lazy('Number of all participants')},
-            {'value': 'CUSTOM_NUMBER', 'display_name': ugettext_lazy('Use the following custom number')}),
-        weight=360,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Voting and ballot papers'))
-
-    yield ConfigVariable(
-        name='motions_pdf_ballot_papers_number',
-        default_value=8,
-        input_type='integer',
-        label=ugettext_lazy('Custom number of ballot papers'),
-        weight=365,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('Voting and ballot papers'),
-        validators=(MinValueValidator(1),))
-
-    # PDF
-
-    yield ConfigVariable(
-        name='motions_pdf_title',
-        default_value=_('Motions'),
-        label=ugettext_lazy('Title for PDF document (all motions)'),
-        weight=370,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('PDF'),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='motions_pdf_preamble',
-        default_value='',
-        label=ugettext_lazy('Preamble text for PDF document (all motions)'),
-        weight=375,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('PDF'))
-
-    yield ConfigVariable(
-        name='motions_pdf_paragraph_numbering',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Show paragraph numbering (only in PDF)'),
-        weight=380,
-        group=ugettext_lazy('Motions'),
-        subgroup=ugettext_lazy('PDF'))
-
-
 def create_builtin_workflows(sender, **kwargs):
     """
     Receiver function to create a simple and a complex workflow. It is
diff --git a/openslides/users/apps.py b/openslides/users/apps.py
index 623adc8f0..bbd2663e3 100644
--- a/openslides/users/apps.py
+++ b/openslides/users/apps.py
@@ -14,15 +14,17 @@ class UsersAppConfig(AppConfig):
         from . import projector  # noqa
 
         # Import all required stuff.
-        from ..core.signals import config_signal, post_permission_creation
+        from ..core.config import config
+        from ..core.signals import post_permission_creation
         from ..utils.rest_api import router
-        from .signals import create_builtin_groups_and_admin, setup_users_config
+        from .config_variables import get_config_variables
+        from .signals import create_builtin_groups_and_admin
         from .views import GroupViewSet, UserViewSet
 
+        # Define config variables
+        config.update_config_varialbes(get_config_variables())
+
         # Connect signals.
-        config_signal.connect(
-            setup_users_config,
-            dispatch_uid='setup_users_config')
         post_permission_creation.connect(
             create_builtin_groups_and_admin,
             dispatch_uid='create_builtin_groups_and_admin')
diff --git a/openslides/users/config_variables.py b/openslides/users/config_variables.py
new file mode 100644
index 000000000..171f313a7
--- /dev/null
+++ b/openslides/users/config_variables.py
@@ -0,0 +1,86 @@
+from django.utils.translation import ugettext as _
+from django.utils.translation import ugettext_lazy
+
+from openslides.core.config import ConfigVariable
+
+
+def get_config_variables():
+    """
+    Generator which yields all config variables of this app.
+
+    They are grouped in 'Sorting' and 'PDF'. The generator has to be evaluated
+    during app loading (see apps.py).
+    """
+    # Sorting
+    yield ConfigVariable(
+        name='users_sort_users_by_first_name',
+        default_value=False,
+        input_type='boolean',
+        label=ugettext_lazy('Sort users by first name'),
+        help_text=ugettext_lazy('Disable for sorting by last name'),
+        weight=510,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('Sorting'))
+
+    # PDF
+
+    yield ConfigVariable(
+        name='users_pdf_welcometitle',
+        default_value=_('Welcome to OpenSlides!'),
+        label=ugettext_lazy('Title for access data and welcome PDF'),
+        weight=520,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'),
+        translatable=True)
+
+    yield ConfigVariable(
+        name='users_pdf_welcometext',
+        default_value=_('[Place for your welcome and help text.]'),
+        label=ugettext_lazy('Help text for access data and welcome PDF'),
+        weight=530,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'),
+        translatable=True)
+
+    # TODO: Use Django's URLValidator here.
+    yield ConfigVariable(
+        name='users_pdf_url',
+        default_value='http://example.com:8000',
+        label=ugettext_lazy('System URL'),
+        help_text=ugettext_lazy('Used for QRCode in PDF of access data.'),
+        weight=540,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'))
+
+    yield ConfigVariable(
+        name='users_pdf_wlan_ssid',
+        default_value='',
+        label=ugettext_lazy('WLAN name (SSID)'),
+        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
+        weight=550,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'))
+
+    yield ConfigVariable(
+        name='users_pdf_wlan_password',
+        default_value='',
+        label=ugettext_lazy('WLAN password'),
+        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
+        weight=560,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'))
+
+    yield ConfigVariable(
+        name='users_pdf_wlan_encryption',
+        default_value='',
+        input_type='choice',
+        label=ugettext_lazy('WLAN encryption'),
+        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
+        choices=(
+            {'value': '', 'display_name': '---------'},
+            {'value': 'WEP', 'display_name': ugettext_lazy('WEP')},
+            {'value': 'WPA', 'display_name': ugettext_lazy('WPA/WPA2')},
+            {'value': 'nopass', 'display_name': ugettext_lazy('No encryption')}),
+        weight=570,
+        group=ugettext_lazy('Users'),
+        subgroup=ugettext_lazy('PDF'))
diff --git a/openslides/users/signals.py b/openslides/users/signals.py
index 34bd75ad5..8192fa28e 100644
--- a/openslides/users/signals.py
+++ b/openslides/users/signals.py
@@ -1,95 +1,9 @@
 from django.contrib.auth.models import Permission
 from django.db.models import Q
-from django.utils.translation import ugettext as _
-from django.utils.translation import ugettext_lazy
 
-from ..core.config import ConfigVariable
 from .models import Group, User
 
 
-def setup_users_config(sender, **kwargs):
-    """
-    Receiver function to setup all users config variables. They are grouped
-    in 'Sorting' and 'PDF'. This function is connected to the signal
-    openslides.core.signals.config_signal during app loading.
-    """
-
-    # Sorting
-
-    yield ConfigVariable(
-        name='users_sort_users_by_first_name',
-        default_value=False,
-        input_type='boolean',
-        label=ugettext_lazy('Sort users by first name'),
-        help_text=ugettext_lazy('Disable for sorting by last name'),
-        weight=510,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('Sorting'))
-
-    # PDF
-
-    yield ConfigVariable(
-        name='users_pdf_welcometitle',
-        default_value=_('Welcome to OpenSlides!'),
-        label=ugettext_lazy('Title for access data and welcome PDF'),
-        weight=520,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'),
-        translatable=True)
-
-    yield ConfigVariable(
-        name='users_pdf_welcometext',
-        default_value=_('[Place for your welcome and help text.]'),
-        label=ugettext_lazy('Help text for access data and welcome PDF'),
-        weight=530,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'),
-        translatable=True)
-
-    # TODO: Use Django's URLValidator here.
-    yield ConfigVariable(
-        name='users_pdf_url',
-        default_value='http://example.com:8000',
-        label=ugettext_lazy('System URL'),
-        help_text=ugettext_lazy('Used for QRCode in PDF of access data.'),
-        weight=540,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'))
-
-    yield ConfigVariable(
-        name='users_pdf_wlan_ssid',
-        default_value='',
-        label=ugettext_lazy('WLAN name (SSID)'),
-        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
-        weight=550,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'))
-
-    yield ConfigVariable(
-        name='users_pdf_wlan_password',
-        default_value='',
-        label=ugettext_lazy('WLAN password'),
-        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
-        weight=560,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'))
-
-    yield ConfigVariable(
-        name='users_pdf_wlan_encryption',
-        default_value='',
-        input_type='choice',
-        label=ugettext_lazy('WLAN encryption'),
-        help_text=ugettext_lazy('Used for WLAN QRCode in PDF of access data.'),
-        choices=(
-            {'value': '', 'display_name': '---------'},
-            {'value': 'WEP', 'display_name': ugettext_lazy('WEP')},
-            {'value': 'WPA', 'display_name': ugettext_lazy('WPA/WPA2')},
-            {'value': 'nopass', 'display_name': ugettext_lazy('No encryption')}),
-        weight=570,
-        group=ugettext_lazy('Users'),
-        subgroup=ugettext_lazy('PDF'))
-
-
 def create_builtin_groups_and_admin(**kwargs):
     """
     Creates the builtin groups: Anonymous, Registered, Delegates and Staff.
diff --git a/openslides/utils/test.py b/openslides/utils/test.py
index 75cb0b9ff..c9f90c6de 100644
--- a/openslides/utils/test.py
+++ b/openslides/utils/test.py
@@ -1,8 +1,6 @@
 from django.test import TestCase as _TestCase
 from django.test.runner import DiscoverRunner
 
-from openslides.core.config import config
-
 
 class OpenSlidesDiscoverRunner(DiscoverRunner):
     def run_tests(self, test_labels, extra_tests=None, **kwargs):
@@ -28,15 +26,8 @@ class OpenSlidesDiscoverRunner(DiscoverRunner):
 
 class TestCase(_TestCase):
     """
-    Overwrites Django's TestCase class to refreshs the config cache.
-    """
+    Does nothing at the moment.
 
-    def _post_teardown(self, *args, **kwargs):
-        return_value = super(TestCase, self)._post_teardown(*args, **kwargs)
-        # Resets the config object by deleting the cache
-        try:
-            del config._cache
-        except AttributeError:
-            # The cache has only to be deleted if it exists.
-            pass
-        return return_value
+    Could be used in the future. Use this this for the integration test suit.
+    """
+    pass
diff --git a/tests/integration/core/test_views.py b/tests/integration/core/test_views.py
index 7545f2bac..31143ca9a 100644
--- a/tests/integration/core/test_views.py
+++ b/tests/integration/core/test_views.py
@@ -1,17 +1,18 @@
 import json
+from unittest.mock import patch
 
 from django.core.urlresolvers import reverse
-from django.dispatch import receiver
 from rest_framework import status
 from rest_framework.test import APIClient
 
 from openslides import __version__ as version
-from openslides.core.config import ConfigVariable, config
+from openslides.core.config import ConfigHandler, ConfigVariable
 from openslides.core.models import CustomSlide, Projector
-from openslides.core.signals import config_signal
 from openslides.utils.rest_api import ValidationError
 from openslides.utils.test import TestCase
 
+config = ConfigHandler()
+
 
 class ProjectorAPI(TestCase):
     """
@@ -74,10 +75,19 @@ class VersionView(TestCase):
                  'version': 'unknown'}]})
 
 
+@patch('openslides.core.config.config', config)
+@patch('openslides.core.views.config', config)
 class ConfigViewSet(TestCase):
     """
     Tests requests to deal with config variables.
     """
+    def setUp(self):
+        config.update_config_varialbes(set_simple_config_view_integration_config_test())
+
+    def tearDown(self):
+        # Reset the config variables
+        config.config_variables = {}
+
     def test_retrieve(self):
         self.client.login(username='admin', password='admin')
         config['test_var_aeW3Quahkah1phahCheo'] = 'test_value_Oovoojieme7eephaed2A'
@@ -178,8 +188,7 @@ def validator_for_testing(value):
         raise ValidationError({'detail': 'Invalid input.'})
 
 
-@receiver(config_signal, dispatch_uid='set_simple_config_view_integration_config_test')
-def set_simple_config_view_integration_config_test(sender, **kwargs):
+def set_simple_config_view_integration_config_test():
     """
     Sets a simple config view with some config variables but without
     grouping.
diff --git a/tests/integration/motions/test_viewset.py b/tests/integration/motions/test_viewset.py
index 32399ca7c..96465bdc3 100644
--- a/tests/integration/motions/test_viewset.py
+++ b/tests/integration/motions/test_viewset.py
@@ -150,7 +150,7 @@ class RetrieveMotion(TestCase):
         self.motion.create_poll()
 
     def test_number_of_queries(self):
-        with self.assertNumQueries(17):
+        with self.assertNumQueries(16):
             self.client.get(reverse('motion-detail', args=[self.motion.pk]))
 
 
diff --git a/tests/old/config/test_config.py b/tests/old/config/test_config.py
index 2ba3b33c8..ed4c11a53 100644
--- a/tests/old/config/test_config.py
+++ b/tests/old/config/test_config.py
@@ -1,12 +1,28 @@
-from django.dispatch import receiver
+from unittest.mock import patch
 
-from openslides.core.config import ConfigVariable, config
+from openslides.core.config import ConfigHandler, ConfigVariable
 from openslides.core.exceptions import ConfigError, ConfigNotFound
-from openslides.core.signals import config_signal
 from openslides.utils.test import TestCase
 
 
+class TestConfigException(Exception):
+    pass
+
+config = ConfigHandler()
+
+
+@patch('openslides.core.config.config', config)
 class HandleConfigTest(TestCase):
+    def setUp(self):
+        config.update_config_varialbes(set_grouped_config_view())
+        config.update_config_varialbes(set_simple_config_view())
+        config.update_config_varialbes(set_simple_config_view_multiple_vars())
+        config.update_config_varialbes(set_simple_config_collection_disabled_view())
+        config.update_config_varialbes(set_simple_config_collection_with_callback())
+
+    def tearDown(self):
+        # Reset the config variables
+        config.config_variables = {}
 
     def get_config_var(self, key):
         return config[key]
@@ -26,24 +42,10 @@ class HandleConfigTest(TestCase):
             self.get_config_var('unknown_config_var')
 
     def test_get_multiple_config_var_error(self):
-        config_signal.connect(
-            set_simple_config_view_multiple_vars,
-            dispatch_uid='set_simple_config_view_multiple_vars_for_testing')
-
         with self.assertRaisesMessage(
                 ConfigError,
                 'Too many values for config variable multiple_config_var found.'):
-            config.setup_cache()
-        config_signal.disconnect(
-            set_simple_config_view_multiple_vars,
-            dispatch_uid='set_simple_config_view_multiple_vars_for_testing')
-
-    def test_database_queries(self):
-        """
-        Test that no database queries are send, after the cache was created.
-        """
-        config.setup_cache()
-        self.assertNumQueries(0, self.get_config_var, key='string_var')
+            config.update_config_varialbes(set_simple_config_view_multiple_vars())
 
     def test_setup_config_var(self):
         self.assertRaises(TypeError, ConfigVariable)
@@ -73,9 +75,8 @@ class HandleConfigTest(TestCase):
         Tests that the special callback is called and raises a special
         message.
         """
-        # TODO: use right exception
         with self.assertRaisesMessage(
-                Exception,
+                TestConfigException,
                 'Change callback dhcnfg34dlg06kdg successfully called.'):
             self.set_config_var(
                 key='var_with_callback_ghvnfjd5768gdfkwg0hm2',
@@ -86,8 +87,7 @@ class HandleConfigTest(TestCase):
             'new_string_kbmbnfhdgibkdjshg452bc')
 
 
-@receiver(config_signal, dispatch_uid='set_grouped_config_view_for_testing')
-def set_grouped_config_view(sender, **kwargs):
+def set_grouped_config_view():
     """
     Sets a grouped config collection. There are some variables, one variable
     with a string as default value, one with a boolean as default value,
@@ -128,8 +128,7 @@ def set_grouped_config_view(sender, **kwargs):
         subgroup='Group 2 Toongai7ahyahy7B')
 
 
-@receiver(config_signal, dispatch_uid='set_simple_config_view_for_testing')
-def set_simple_config_view(sender, **kwargs):
+def set_simple_config_view():
     """
     Sets a simple config view with some config variables but without
     grouping.
@@ -139,8 +138,7 @@ def set_simple_config_view(sender, **kwargs):
     yield ConfigVariable(name='none_config_var', default_value=None)
 
 
-# Do not connect to the signal now but later inside the test.
-def set_simple_config_view_multiple_vars(sender, **kwargs):
+def set_simple_config_view_multiple_vars():
     """
     Sets a bad config view with some multiple config vars.
     """
@@ -148,15 +146,13 @@ def set_simple_config_view_multiple_vars(sender, **kwargs):
     yield ConfigVariable(name='multiple_config_var', default_value='foobar2')
 
 
-@receiver(config_signal, dispatch_uid='set_simple_config_collection_disabled_view_for_testing')
-def set_simple_config_collection_disabled_view(sender, **kwargs):
+def set_simple_config_collection_disabled_view():
     yield ConfigVariable(name='hidden_config_var_2', default_value='')
 
 
-@receiver(config_signal, dispatch_uid='set_simple_config_collection_with_callback_for_testing')
-def set_simple_config_collection_with_callback(sender, **kwargs):
+def set_simple_config_collection_with_callback():
     def callback():
-        raise Exception('Change callback dhcnfg34dlg06kdg successfully called.')
+        raise TestConfigException('Change callback dhcnfg34dlg06kdg successfully called.')
     yield ConfigVariable(
         name='var_with_callback_ghvnfjd5768gdfkwg0hm2',
         default_value='',
diff --git a/tests/unit/config/test_api.py b/tests/unit/config/test_api.py
index ef061efa2..d059401bc 100644
--- a/tests/unit/config/test_api.py
+++ b/tests/unit/config/test_api.py
@@ -1,7 +1,7 @@
 from unittest import TestCase
 from unittest.mock import patch
 
-from openslides.core.config import ConfigHandler, ConfigVariable, config
+from openslides.core.config import ConfigVariable, config
 from openslides.core.exceptions import ConfigNotFound
 
 
@@ -26,12 +26,7 @@ class TestConfigVariable(TestCase):
 
 
 class TestConfigHandler(TestCase):
-    def test_get_from_cache(self):
-        ConfigHandler._cache = {'key_eeshah4Sho6zailee4ko': 'value_chies7aCohZoo9umieph'}
-        self.assertEqual(config['key_eeshah4Sho6zailee4ko'], 'value_chies7aCohZoo9umieph')
-
     def test_get_not_found(self):
-        ConfigHandler._cache = {}
         self.assertRaises(
             ConfigNotFound,
             config.__getitem__,