Question: I'm running ...[xxx-system]... with Xserver and keep 
having problems launching a display monitor when executing d.mon 
(from x0 to x7). Here  is the error message: 
 
d.mon start=x0
   Graphics driver [x0] is already running
   ERROR - eof from graphics monitor.
   Problem selecting x0. Will try once more
   ERROR - eof from graphics monitor.


Answer: Obviously the monitor/system crashed before.
The "Monitor-lock" file is still there and must be removed
manually.


Solution:


Start GRASS. Change directory to 
  cd $GISBASE/locks

There you find a directory names like your machine. Go there:
  cd "mymachine"       # e.g.: cd bermuda

List the files within this directory and remove them:
  rm -f mon.*

Go back home:
  cd ~

Now you can start a new GRASS monitor.


Markus Neteler     Wed May 10 2000