--- /usr/lib/python3/dist-packages/UpdateManager/Dialogs.py     2013-10-03 22:27:36.000000000 +0200
+++ Dialogs.py  2013-10-09 21:02:45.177900181 +0200
@@ -310,4 +310,17 @@
                 proxy_obj, "org.freedesktop.ConsoleKit.Manager")
             iface.Restart()
         except dbus.DBusException:
+            self._request_reboot_via_logind()
+        except:
+            pass
+
+    def _request_reboot_via_logind(self):
+        try:
+            bus = dbus.SystemBus()
+            proxy_obj = bus.get_object("org.freedesktop.login1",
+                                       "/org/freedesktop/login1")
+            iface = dbus.Interface(
+                proxy_obj, "org.freedesktop.login1.Manager")
+            iface.Reboot(True)
+        except dbus.DBusException:
             pass