[PATCH v2 0/3] Fix Win8 backlight issue

Aaron Lu aaron.lu at intel.com
Sun Sep 22 02:10:59 PDT 2013

On 09/18/2013 08:36 PM, Igor Gnatenko wrote:
> On Wed, 2013-09-18 at 20:31 +0800, Aaron Lu wrote:
>> On 09/18/2013 02:30 PM, Igor Gnatenko wrote:
>>> On Wed, 2013-09-18 at 09:03 +0800, Aaron Lu wrote:
>>>> On 09/17/2013 09:34 PM, Igor Gnatenko wrote:
>>>>> Aaron, how about fix indicator on ThinkPads ?
>>>> Can you please describe the problem in detail, is it that when you
>>>> adjust brightness level through hotkey, there is no GUI indication?
>>>> Thanks.
>>>> -Aaron
>>> Yes. On my ThinkPad X230 I pressing backlight hotkeys. Actually
>>> brightnes changing, but have no indicator in GUI.
>> Oh, that's still the problem of _BCL not getting executed once for
>> Lenovo thinkpad laptops. I borrowed a Thinkpad X1 this afternoon and can
>> reproduce this, I'll take a look at this issue. The thinkpad-acpi module
>> already has a call to _BCL but somehow that doesn't happen.
>> Since it's national holidays here, I'll check this issue when I got back
>> to work on this Saturday. Thanks for the quick test :-)
> Thanks. No problem ;-)

Here is a quick fix for thinkpad-acpi.c:
https://github.com/aaronlu/linux acpi_video_win8
commit thinkpad-acpi: fix handle locate for video and query of _BCL.

Note that it is a separate issue specifically for thinkpad so I'll
submit that patch in another thread.


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