debian:/home/kde4# startx
xauth:  creating new authority file /root/.Xauthority
xauth:  creating new authority file /root/.Xauthority

X: warning; process set to priority -1 instead of requested priority 0

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

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.