[K12OSN] hangs on X server screen

[Joe Guenther]

This morning, on an othewise functional 4.2 system for the past 2 
months, a whole lab had trouble logging in a the terminals.  The 
workstations would boot, but stay stuck on the grey screen with the big 
X cursor.  I then rebooted the server, and with one or two workstations 
booting simultaneously I got the class logged in.  Then on logout, all 
workstations are stuck on the grey X screen.  no reboot of the server 
has solved this.  I have deleted the entire /tmp directory in an attempt 
to clear crud that has stuck around ... no luck

What is happening? are there tmp, cache or log files that need to be 
cleared?  These workstations were fine on Friday and at 8:00 this 
morning I could get in from a workstation in my office, but now nobody 
can get in.

Is there a cron job that I can create to keep this from happening again?

Joe Guenther
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Lantech - Didsbury
Chinook's Edge School Div.