I, too, have this exact same error message.
Xubuntu 16.04.1
It happens every time after I unlock the session. An additional Problem that might be connected - tough I have no idea: Every time after I unlock the session keyboard shortcuts like Alt+F2 or Strg+Alt+<right> fail for several seconds.
I, too, have this exact same error message.
Xubuntu 16.04.1
It happens every time after I unlock the session. An additional Problem that might be connected - tough I have no idea: Every time after I unlock the session keyboard shortcuts like Alt+F2 or Strg+Alt+<right> fail for several seconds.