linux-kernel - Re: [Bug #15096] Resume lock up -- bisected, commit 3a1151e3f124fd1a2c54b8153f510f1a7c715369

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Date:	Mon, 8 Feb 2010 20:34:43 +0100
From:	Rafał Miłecki <zajec5@...il.com>
To:	Stefan Bader <stefan.bader@...onical.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Len Brown <len.brown@...el.com>,
	Zhang Rui <rui.zhang@...el.com>
Subject: Re: [Bug #15096] Resume lock up -- bisected, commit 
	3a1151e3f124fd1a2c54b8153f510f1a7c715369

2010/2/8 Stefan Bader <stefan.bader@...onical.com>:
> Rafael J. Wysocki wrote:
>> On Monday 08 February 2010, Rafał Miłecki wrote:
>>> 2010/2/8 Stefan Bader <stefan.bader@...onical.com>:
>>>> Rafael J. Wysocki wrote:
>>>>> On Monday 08 February 2010, Rafał Miłecki wrote:
>>>>>> 2010/2/8 Rafael J. Wysocki <rjw@...k.pl>:
>>>>>>> This message has been generated automatically as a part of a report
>>>>>>> of regressions introduced between 2.6.31 and 2.6.32.
>>>>>>>
>>>>>>> The following bug entry is on the current list of known regressions
>>>>>>> introduced between 2.6.31 and 2.6.32.  Please verify if it still should
>>>>>>> be listed and let the tracking team know (either way).
>>>>>>>
>>>>>>>
>>>>>>> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=15096
>>>>>>> Subject         : Resume lock up -- bisected, commit 3a1151e3f124fd1a2c54b8153f510f1a7c715369
>>>>>>> Submitter       : Rafał Miłecki <zajec5@...il.com>
>>>>>>> Date            : 2010-01-20 23:15 (19 days old)
>>>>>>> First-Bad-Commit: http://git.kernel.org/git/linus/3a1151e3f124fd1a2c54b8153f510f1a7c715369
>>>>> It looks like we should revert this commit, seems broken.
>>>> Hm, otoh we had definitely people with some Asus laptops who where only be able
>>>> to use backlight control with it. So I would rather prefer some work around to
>>>> the suspend/resume problem (_DOS if I understood correctly).
>>> It's same case with my Sony VAIO. Without this I can not control
>>> backlight. Eventually I can hack on GPU registers directly, but I
>>> don't think it can be called solution.
>>
>> Well, do I understand correctly that without commit
>> 3a1151e3f124fd1a2c54b8153f510f1a7c715369 you can't control the backlight,
>> but with the commit applied there's a resume problem on your box?
>>
>> Rafael
>
> Rafał can correct me. I would phrase it that way that without the bisected
> patch, there is no backlight control. And because there is with it, we hit the
> next BIOS bug because the backlight driver now tries to correctly bring it back
> on resume.

Do you suspect some conflict between video module and BIOS? Any more ideas?

-- 
Rafał
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