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From: Philipp Klaus Krause <pkk@spth.de>
To: Keith Packard <keithp@keithp.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: Screen corruption regression from 3.0 to 3.1rc4
Date: Wed, 07 Sep 2011 19:16:44 +0200	[thread overview]
Message-ID: <4E67A6FC.5030405@spth.de> (raw)
In-Reply-To: <yunfwk9ekfw.fsf@aiko.keithp.com>

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Am 06.09.2011 17:53, schrieb Keith Packard:
> On Tue, 06 Sep 2011 15:11:12 +0200, Philipp Klaus Krause <pkk@spth.de> wrote:
> 
>> Here's the output from git-bisect:
>>
>> d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e is the first bad commit
>> commit d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e
>> Author: Keith Packard <keithp@keithp.com>
>> Date:   Thu Jul 28 14:47:14 2011 -0700
>>
>>     drm/i915: Flush other plane register writes
>>
>>     Writes to the plane control register are buffered in the chip until a
>>     write to the DSPADDR (pre-965) or DSPSURF (post-965) register
>>     occurs.
> 
> Makes me wonder if this is some interaction between page flipping and
> frame buffer compression. Could you try turning it off with the
> following kernel command line parameter?
> 
>         i915.i915_enable_fbc=0
> 

The problem goes away with i915.i915_enable_fbc=0. I'll probably use
that workaround  until the issue is fixed.

Philipp
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  reply	other threads:[~2011-09-07 17:16 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-31  6:43 Screen corruption regression from 3.0 to 3.1rc4 Philipp Klaus Krause
2011-09-03  9:31 ` Philipp Klaus Krause
2011-09-03 10:43   ` Daniel Vetter
2011-09-03 10:52     ` Philipp Klaus Krause
2011-09-03 11:53       ` Daniel Vetter
2011-09-06 13:11       ` Philipp Klaus Krause
2011-09-06 15:53         ` Keith Packard
2011-09-07 17:16           ` Philipp Klaus Krause [this message]
2011-09-08 13:43             ` Eugeni Dodonov
2011-09-08 20:19               ` Philipp Klaus Krause

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