Hi,

I'm not expecting a 'do this and it'll be fixed' answer - I'm just after
some pointers to help me track down what is going on. Once I have some
better data/logs I might return with more info:

Here's the symptoms: Every now and again, for no apparent reason
whatsoever, X locks up *totally*. No mouse, no keyboard response
(including no toggling of keyboard lights), nothing. However linux is
still running because I can ssh in from another machine and investigate
from there. In every case, the only process using more than 1% of the CPU
(using top) is 'XFree86' - it sits there on > 96%CPU and never comes down.
If I kill -9 it, game over. Total system crash. The only thing that seems
to work is an init 6 (reboot).

I have tried going through and selectively killing X clients to see if the
X server will spring back into life. It doesn't. Even killing the window
manager (fluxbox) doesn't stop X.

I'm running X from a tty with the xinit command. It's 4.1.0-17
(debianised) and running dual-head xinerama over two Nvidia cards (using
their driver: 2880). Kernel is 2.4.19-pre8 with a video4linux2 patch.

I had a very similar problem when I ran X not in xinerama but as two
'screens' (:0.0 and :0.1 i think) - if I moved a window off the far right
hand side of my combined desktop and 'wiggled' it around a bit (so it's
half-on, half-off, kinda) sooner or later, same problem. Lock up. Not sure
if it's exactly the same tho - now there's nothing that I do that seems to
cause it.

How can I begin to track this problem down? It's unrepeatable (although
frequent enough to be annoying) and there's no screen output I can capture
it would seem. XFree86.0.log contains nothing useful. Nor does syslog.

Any thoughts?

Thanks,
David.



David Antliff                       [EMAIL PROTECTED]
Design Engineer
Med-Dev Ltd.                        tel. +64-4-972-7661
Wellington, New Zealand             www.med-dev.co.nz




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