不能进入图形界面

Fatal server error:
Server is already active for display 0
If this server is no longer running,remove /tmp/.X0-lock and start again.

Please consult the The X.Org Foundation support at http://wiki.x.org for help.

ddxSigGiveUp: Closing log
Invalid MIT-MAGIC-COOKIE-1 keygiving up.
xinit:Resource temporarily unavailable (errno 11):unable to connect to X server
xinit:No such process (errno 3):Server error.