linux-kernel - Re: [Intel-gfx] [PATCH] drm/i915: Disable all outputs early, before KMS takeover

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Date:	Fri, 1 Apr 2011 14:51:42 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Chris Wilson <chris@...is-wilson.co.uk>,
	intel-gfx@...ts.freedesktop.org, Pekka Enberg <penberg@...nel.org>,
	linux-kernel@...r.kernel.org
Cc:	Daniel Vetter <daniel@...ll.ch>
Subject: Re: [Intel-gfx] [PATCH] drm/i915: Disable all outputs early, before
 KMS takeover

On Fri, Apr 1, 2011 at 2:44 PM, Daniel Vetter <daniel@...ll.ch> wrote:
> On Tue, Mar 29, 2011 at 11:46:29AM +0100, Chris Wilson wrote:
>> If the outputs are active and continuing to access the GATT when we
>> teardown the PTEs, then there is a potential for us to hang the GPU.
>> The hang tends to be a PGTBL_ER with either an invalid host access or
>> an invalid display plane fetch.
>
> This patch seems to fix resume flakiness (that recently developed
> complete reliability in hanging the gpu) on my i855gm. Captured
> error_states look as described here. Latest -staging merged into latest
> -linus is now again fully reliable at s/r.
>
> Tested-by: Daniel Vetter <daniel.vetter@...ll.ch>

Unfortunately I get a blank screen with after boot:

Nacked-by: Pekka Enberg <penberg@...nel.org>
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