SUMMARY: Screen Lockup on 1000

From: Craig Gruneberg (
Date: Tue Jun 20 1995 - 15:10:19 CDT

Thanks to all who responded to my original question:

> On a few occasions recently, the monitor attached to our
> Sparc 1000 becomes locked up in the screenblank state. So
> today I remotely killed the screenblank routine and that
> took the screen out of blank but it appears there is no
> communication now between the 1000 and the monitor even
> though the 1000 is humming along just fine.
> Is there any way to get these 2 guys talking together again
> short of a reboot? I thought I could find a driver process
> for the monitor and give it a kill -1 but I can't.

I received the following 4 replies. I've only had one lockup
since I posted and, after trying Stephen Hauskins suggestion
( I was able to CTRL C the monitor
back to life after issuing the kbd_mode -a command.

More testing is required.

If you have openwindows installed, try using the command:
/usr/openwin/bin/kbd_mode -a
This should revive the monitor.


From: (Jeff Marble)

Sun has said that this is a bug with screenblank and the a conflict with the
date command. For us it was on several machines, but for only several hours.
Our only way to get the monitor back was to reboot.


From: "Brian T. Wightman" <>

Sorry if this is late. You may have hit a ^S. This happens to us
quite frequently in our "open" labs. Try a ^Q to see if that restarts
the screen.


From: root@treveris.Uni-Trier.DE (Smooth Operator)

we do have very similar problems. The usual way to recover is simply
sending a kill -HUP to init.
If this doesn't work your propably will have to reboot.


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