Comment 1 for bug 1021484

Also unable to disable the global menu, here is the full error:-

 unsettings
/usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
  import gobject._gobject
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/unsettings/main.py", line 187, in on_ac_apply_activate
    self.apply_settings()
  File "/usr/lib/python2.7/dist-packages/unsettings/main.py", line 127, in apply_settings
    self.connections.store()
  File "/usr/lib/python2.7/dist-packages/unsettings/connection.py", line 114, in store
    conn.store()
  File "/usr/lib/python2.7/dist-packages/unsettings/connection.py", line 77, in store
    self.set_value(self.get_widget().get_data())
  File "/usr/lib/python2.7/dist-packages/unsettings/connection.py", line 60, in set_value
    self.data_store[self.data_key] = value
  File "/usr/lib/python2.7/dist-packages/unsettings/backends.py", line 64, in __setitem__
    self.set(key, value)
  File "/usr/lib/python2.7/dist-packages/unsettings/backends.py", line 101, in set
    self.backends[scheme].set(name, value)
  File "/usr/lib/python2.7/dist-packages/unsettings/backends.py", line 142, in set
    settings.set_value(name, GLib.Variant(type_string, value))
  File "/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py", line 167, in __new__
    (v, rest_format, _) = creator._create(format_string, [value])
  File "/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py", line 67, in _create
    v = constructor(args[0])
  File "/usr/lib/python2.7/dist-packages/gi/types.py", line 72, in constructor
    return info.invoke(cls, *args, **kwargs)
TypeError: Argument 0 does not allow None as a value