SUMMARY : Server console hangs

From: Eckhard Rueggeberg (
Date: Wed Dec 11 1991 - 11:24:07 CST

Yesterday, I asked for help with my server console hanging. I had tried
several reboots and fastboot, which didn't help. Today I tried a power
cycle and that did help: Everything is fine and I don't know exactly why. (Birger Wathne) told me the following :

> The problem with the blank screen may be someone running a console window
> from your server somewhere. If someone logs in to the server from
> another host running X, and start xterm -C, cmdtool -C, contool, or
> any other program that grabs the console output, you will se this
> kind of behaviour.
> Normaly, this is because someone is running a console window as part
> of the .xsession or .openwin-init on an X-terminal.

I think that in fact the user being logged in at crash time locked the
console somehow, because "cat .login > /dev/console" fell asleep always.
This lock has gone due to power cycling.

I would be glad to know the reason for panicking nevertheless ! Messages were

Dec 10 15:34:26 cfgauss vmunix: panic: error in swapping in u-area
Dec 10 15:34:26 cfgauss vmunix: syncing file systems... [18] [17] [13] [9] [3]
[1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] give up!

Traceback was
f811add0 f804d7a0 _panic+ 6c f81271b8 f8394000 4000 2 39 505
f811ae30 f8068efc _swapin+ 64 f81f0d6c 205 2 0 4000 2
f811ae90 f8068b3c _sched+ 33c f8145a10 f81f0d6c f8145a04 fd 2 2
f811aef8 f803341c _main+ 384 114000e3 7fffe000 28f71f23 fffe f811b000 f81ef368

Swap is to raw partitions on two disks.

Eckhard R"uggeberg

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