gpu freeze

gpu freeze

[Alexey Fisher]

What info should i collect if i get GPU hung?

I currently get one, with kernel 2.6.36-07532-gbbe2e11
it happened after i started video. Interesting is my PC worked 15 hours,
many things was done it was not first video. So fear i can't reproduce
or bisect it. This is first hung for some weeks or months...
-- 
Regards,
        Alexey

Re: gpu freeze

[Peter Clifton]

On Sat, 2010-10-30 at 20:22 +0200, Alexey Fisher wrote:
> What info should i collect if i get GPU hung?
> 
> I currently get one, with kernel 2.6.36-07532-gbbe2e11
> it happened after i started video. Interesting is my PC worked 15 hours,
> many things was done it was not first video. So fear i can't reproduce
> or bisect it. This is first hung for some weeks or months...

As a non-expert, non-canonical answer (in the non-commercial sense of
the word canonical), I would primarily be interested in saving the
contents of /sys/kernel/debug/dri/0/i915_error_state

You can decompile that with "intel_error_decode $file"

Also, note if there are any interesting messages in dmesg pertaining to
drm / gem / i915 (caps or non-caps for all), and anything unusual in the
end of /var/log/Xorg.0.log or /var/log/Xorg.0.log.old if your X server
has restarted.

The error state ought to be relevant to the hang assuming you've not
rebooted or had any subsequent hangs.

Best wishes,

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)