После обновления lightdm перестал запускаться, пишет:

lightdm.service - Light Display Manager
   Loaded: loaded (/usr/lib/systemd/system/lightdm.service; enabled)
   Active: failed (Result: start-limit) since Вс 2014-03-23 17:27:32 UTC; 1min 37s ago
     Docs: man:lightdm(1)
  Process: 399 ExecStart=/usr/bin/lightdm (code=exited, status=1/FAILURE)
 Main PID: 399 (code=exited, status=1/FAILURE)

мар 23 17:27:32 Machine-1 systemd[1]: lightdm.service holdoff time over, scheduling restart.
мар 23 17:27:32 Machine-1 systemd[1]: Stopping Light Display Manager...
мар 23 17:27:32 Machine-1 systemd[1]: Starting Light Display Manager...
мар 23 17:27:32 Machine-1 systemd[1]: lightdm.service start request repeated too quickly, refusing to start.
мар 23 17:27:32 Machine-1 systemd[1]: Failed to start Light Display Manager.
мар 23 17:27:32 Machine-1 systemd[1]: Unit lightdm.service entered failed state.