monitor locking process error

[roland muench]

Dear Grass-users,

        Have installed grass4.1.5 including update patch1 and Linux slackware3 
with kernel 1.2.13 in umsdos mode on a Compaq Presario 5522
after splitting my harddisk with fips.Run win95 on the other part.
Video chip set S3-Trio64
        Everything seems fine exept:
When I try d.mon start=x0 or d.mon select=x0 ,a monitor comes up but
then the following message:

$:Error - Could not complete locking process for monitor <x0> 
  Lockfile is /usr/local/grass/locks/darkstar/mon.4721494

Being a total novice to both Linux and Grass Im at a loss at this one.
Suspect a problem with memory or initab file.Help Help Help.....

Thanks in advance
Roland Muench - Landscape Architect
Darwin-Northern Territory-Australia
roland at taunet.net.au