[Intel-gfx] regression on vanilla kernel "drm/i915: framebuffer compression for pre-GM45"

[Alexey Fisher]

Jesse Barnes schrieb:
> On Fri, 25 Sep 2009 12:57:06 +0200
> Alexey Fisher <bug-track at fisher-privat.net> wrote:
> 
>> Hallo Barnes,
>> i just found regression on vanilla kerenl. On my eeepc p1005ha after 
>> this patch xorg will be heavy loaded with cursor flickering.
>>
>>
>>
>> commit 8082400327d8d2ca54254b593644942bed0edd25
>> Author: Jesse Barnes <jbarnes at virtuousgeek.org>
>> Date:   Thu Sep 10 15:28:06 2009 -0700
>>
>>      drm/i915: framebuffer compression for pre-GM45
>>
>>      This patch adds framebuffer compression (good for about ~0.5W
>> power savings in the best case) support for pre-GM45 chips.  GM45+
>> have a new,
>>      more flexible FBC scheme that will be added in a separate patch.
>>
>>      FBC can't always be enabled: the compressed buffer must be
>> physically contiguous and reside in stolen space.  So if you have a
>> large display and a small amount of stolen memory, you may not be
>> able to take advantage of FBC.  In some cases, a BIOS setting
>> controls how much stolen space is available.  Increasing this to 8 or
>> 16M can help.
>>
>>      Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
>>      Signed-off-by: Eric Anholt <eric at anholt.net>
> 
> Can you load drm with debug=1 and send me the output from when i915
> loads?
> 
> Jesse

Here is it.
Alexey
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