linux-kernel - Re: 2.6.35-rc6+: i915: Bisected regression

Open Source and information security mailing list archives

Date:	Thu, 05 Aug 2010 13:43:04 +0800
From:	Shuang He <shuang.he@...el.com>
To:	Thomas Meyer <thomas@...3r.de>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	"Zou, Nanhai" <nanhai.zou@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: Re: 2.6.35-rc6+: i915: Bisected regression

  On 2010-8-1 18:51, Thomas Meyer wrote:
> Am 01.08.2010 um 13:42 schrieb Stefan Richter<stefanr@...6.in-berlin.de>:
>
>> Thomas Meyer wrote:
>>> This commit makes suspend to ram unreliable for me:
>>>
>>> commit d1b851fc0d105caa6b6e3e7c92d2987dfb52cbe0
>>> Author: Zou Nan hai<nanhai.zou@...el.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@...el.com>
>>>     Signed-off-by: Xiang Hai hao<haihao.xiang@...el.com>
>>>     Signed-off-by: Eric Anholt<eric@...olt.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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> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

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