Re: [BUG] intel KMS bug on i915

[Mathieu Taillefumier]

Hello,
> On Wed, 2009-11-11 at 12:44 +0100, Mathieu Taillefumier wrote:
>    
> > Hello,
> >
> > I recently switched to the last git kernel (the rc6) and have a serious
> > problem with KMS and xorg. I reported it to the xorg list but after some
> > research it seems that this problem is caused by some recent change in
> > the intel KMS stack. Some warnings and errors are reported by the
> > kernel. they are the following (only a small part of it):
> >
> > [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
> > render error detected, EIR: 0x00000000
> > i915: Waking up sleeping processes
> > [drm:i915_wait_request] *ERROR* i915_wait_request returns -5 (awaiting 2
> > at 1)
> > [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
> > render error detected, EIR: 0x00000000
> >
> > This problem is recurrent with all 2.6.32-rc versions and gives rise to
> > an unusable xorg (independent of the version), while the same xorg stack
> > works pretty well with the 2.6.31 kernel. The hardware is a sony laptop
> > with a intel 965 chipset and the bug can be reproduced at 100%
> >      
> Could you bisect the problem?  I don't think I've seen reports of this
> (fails at a time other than resume)
>    
Thanks for the reply.

I will try to bissect the problem (I have to start from the first rc1 
and go backward from that) but it might take some time since I am not an 
expert in git. What I can say is that the problem occur since the first 
rc of the kernel (and whatever recent version of libdrm). Moreover, I 
have this after a cold boot. Another person reported the same problem on 
the xorg list, so I am not alone :-).

regards

Mathieu

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