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SubjectRe: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys (BISECTED)
On 04/15/2009 02:41 AM, Maxim Levitsky wrote:
> On Wed, 2009-04-15 at 01:59 +0200, Niel Lambrechts wrote:
>
>> On 04/13/2009 10:34 PM, Henrique de Moraes Holschuh wrote:
>>
>>> On Mon, 13 Apr 2009, Niel Lambrechts wrote:
>>>
>>>
>>>>>> In 2.6.29.1:
>>>>>> lrwxrwxrwx 1 root root 0 Apr 12 20:01 /sys/class/backlight/acpi_video0
>>>>>> -> ../../devices/virtual/backlight/acpi_video0
>>>>>>
>>>>>>
>>> Well, that at least confirms that thinkpad-acpi doesn't have anything to
>>> do with your troubles, you were using acpi video.
>>>
>>>
>> Okay, I've bisected it to:
>>
>> 74a365b3f354fafc537efa5867deb7a9fadbfe27 is first bad commit
>> commit 74a365b3f354fafc537efa5867deb7a9fadbfe27
>> Author: Matthew Garrett <mjg59@srcf.ucam.org>
>> Date: Thu Mar 19 21:35:39 2009 +0000
>>
>> ACPI: Populate DIDL before registering ACPI video device on Intel
>>
>> ---
>>
>> Matthew, can you help?
>>
>> Regards,
>> Niel
>>
>
>
> Just to note,
>
> I have nvidia, and yet have the same bug.
> I reverted this commit - didn't help.
>
While you may have _some_ of the same symptoms, you clearly don't have
the same bug.

I reverted the commit as well, and my laptop is working fine under
2.6.30-rc2 now.

> I get lots of
> ACPI: Failed to switch the brightnes
> when I press hardware keys that change brightness
> (even these sometimes don't work)
>
Mine consistently did not work, and I had no messages.

I understand you could try to do a limited bisect using something like
git bisect start -- drivers/acpi drivers/video

Perhaps you can do a bisect as well?

Regards,
Niel



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