linux-kernel - Re: [Bug #15004] i915: *ERROR* Execbuf while wedged

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Date:	Mon, 8 Feb 2010 15:00:44 -0500
From:	Chris Mason <chris.mason@...cle.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	tomas m <tmezzadra@...il.com>
Subject: Re: [Bug #15004] i915: *ERROR* Execbuf while wedged

On Mon, Feb 08, 2010 at 09:35:51AM -0800, Jesse Barnes wrote:
> > 
> > Ok, updating to rc7 and updating my xf86 driver to 2.10 seems to have
> > fixed up my suspend/resume problems.  So, I should be able to trigger
> > the execbuf problem again.
> 
> I've heard some reports that the 2D driver introduces and fixes hangs,
> so it's possible 2.10 will fix both issues for you.
> 
> > Well, the rebooting isn't a huge deal, but if there's something I can
> > track/kick or force to core dump, would it help?
> 
> We do have a test in intel-gpu-tools that will instigate a hang, but it
> would be best to figure out what's causing it in your environment.
> 

[63516.632060] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[63516.632069] render error detected, EIR: 0x00000000
[63516.632092] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 2590581 at 2590579)

So, this popped up while surfing in firefox, which is usually where I
hit the execbuf errors.  X was totally stuck afterwards, but I could
switch to a vc and get the dmesg.

If there are specific procs that I can try to get traces of, just let
me know for next time.

-chris

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