This bug report was converted into a question: question #201544: Login.
I had type startx in terminal I got following error I restart my notebook after that I an unable to login
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
ddxSigGiveUp: Closing log
How should I remove /tmp/.X0-lock
Plz solve my problem From last 16 days I am unable to use my notebook