diff --git a/sat_frontends/quick_frontend/quick_app.py b/sat_frontends/quick_frontend/quick_app.py
index bfbe4d54..a7be02a0 100644
--- a/sat_frontends/quick_frontend/quick_app.py
+++ b/sat_frontends/quick_frontend/quick_app.py
@@ -329,6 +329,7 @@ class QuickApp(object):
         self.features = None
         self.ns_map = {}  # map of short name to namespaces
         self.encryption_plugins = []
+        self._sync = True  # state of synchronisation with backend
 
     def connectBridge(self):
         self.bridge.bridgeConnect(callback=self._bridgeCb, errback=self._bridgeEb)
@@ -425,6 +426,43 @@ class QuickApp(object):
             if isinstance(w, quick_widgets.QuickWidget):
                 return w
 
+    # backend state management
+
+    @property
+    def sync(self):
+        """Get synchronization flag
+
+        True if this frontend is synchronised with backend
+        """
+        return self._sync
+
+    @sync.setter
+    def sync(self, state):
+        """Called when backend is desynchronised or resynchronising
+
+        @param state(bool): True: if the backend is resynchronising
+            False when we lose synchronisation, for instance if frontend is going to sleep
+            or if connection has been lost and a reconnection is needed
+        """
+        if state:
+            # we are resynchronising
+            for w in self.widgets:
+                try:
+                    resync = w.resync
+                except AttributeError:
+                    pass
+                else:
+                    resync()
+            self._sync = state
+        else:
+            self._sync = state
+            # we've lost synchronisation
+            for w in self.widgets:
+                try:
+                    w.sync = False
+                except AttributeError:
+                    pass
+
     def registerSignal(
         self, function_name, handler=None, iface="core", with_profile=True
     ):
diff --git a/sat_frontends/quick_frontend/quick_widgets.py b/sat_frontends/quick_frontend/quick_widgets.py
index a3aaef41..a0c5f832 100644
--- a/sat_frontends/quick_frontend/quick_widgets.py
+++ b/sat_frontends/quick_frontend/quick_widgets.py
@@ -125,7 +125,7 @@ class QuickWidgetsManager(object):
     def getWidget(self, class_, target=None, profiles=None):
         """Get a widget without creating it if it doesn't exist.
 
-        @param class_(class): class of the widget to create
+        @param class_: subclass of QuickWidget, same parameter as used in [getOrCreateWidget]
         @param target: target depending of the widget, usually a JID instance
         @param profiles (unicode, iterable[unicode], None): profile(s) to use (may or may not be
             used, depending of the widget class)