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From: Shuang He on 5 Aug 2010 01:50
On 2010-8-1 18:51, Thomas Meyer wrote:
> Am 01.08.2010 um 13:42 schrieb Stefan Richter<stefanr(a)s5r6.in-berlin.de>:
>
>> Thomas Meyer wrote:
>>> This commit makes suspend to ram unreliable for me:
>>>
>>> commit d1b851fc0d105caa6b6e3e7c92d2987dfb52cbe0
>>> Author: Zou Nan hai<nanhai.zou(a)intel.com>
>>> Date: Fri May 21 09:08:57 2010 +0800
>>>
>>> drm/i915: implement BSD ring buffer V2
>>>
>>> The BSD (bit stream decoder) ring is used for accessing the BSD engine
>>> which decodes video bitstream for H.264 and VC1 on G45+. It is
>>> asynchronous with the render ring and has access to separate parts of
>>> the GPU from it, though the render cache is coherent between the two.
>>>
>>> Signed-off-by: Zou Nan hai<nanhai.zou(a)intel.com>
>>> Signed-off-by: Xiang Hai hao<haihao.xiang(a)intel.com>
>>> Signed-off-by: Eric Anholt<eric(a)anholt.net>
>>>
>>> git revert didn't work on 2.6.35-rc6 so I just changed the HAS_BSD thing to:
>>>
>>> #define HAS_BSD(dev) (0)
>>>
>>> with this change applied suspend to ram is back to the reliability of 2.6.34.y
>>>
>>> with kind regards
>>> thomas
>> Added CCs.
>>
>> Thomas, on what hardware did you observe the regression?
> Is a Intel mobile express gm45 chipset.
>
>> Is it suspend
>> or resume that is unreliable?
> suspend never finishes/hangs.
>
>> What are the particular symptoms --- does
>> not suspend, crashes during suspend, crashes during resume...?
> Does not suspend, backlight is on.


Could you help report a bug for this issue by following
http://intellinuxgraphics.org/how_to_report_bug.html

Thanks
--Shuang

>> --
>> Stefan Richter
>> -=====-==-=- =--- ----=
>> http://arcgraph.de/sr/
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From: David John on 6 Aug 2010 00:00
On 08/05/2010 11:13 AM, Shuang He wrote:

> Could you help report a bug for this issue by following
> http://intellinuxgraphics.org/how_to_report_bug.html
>

I have the same issue on a GM45 and Thomas's hack works in fixing it. It
is still present in 2.6.35.

Regards,
David.
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