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Date:	Mon, 16 Nov 2009 20:54:21 -0800
From:	Eric Anholt <>
To:	Mathieu Taillefumier <>
Subject: Re: [BUG] intel KMS bug on i915

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)

Eric Anholt               

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