[Raring][Quantal SRU] ACPI video: ignore BIOS initial backlight value

Alex Hung alex.hung at canonical.com
Thu Jun 6 06:31:24 UTC 2013


On 06/06/2013 02:01 PM, Brad Figg wrote:
> On 06/04/2013 02:48 AM, Alex Hung wrote:
>> SRU Justification:
>>
>> Impact:
>> ACPI VGA driver reads from BIOS's _BQC during initialization and use it
>> to set the brightness; however, some BIOS returns zero when it boots,
>> and causes complete dark on LCD panel.
>>
>> Fix:
>> The patch fix the bug by skipping the _BQC value and set the brightness
>> to maximum.
>>
>>
>> BugLink: http://bugs.launchpad.net/bugs/1167760
>>
>
> Alex,
>
> I'd like to see you go ahead and submit this to the upstream stable mailing
> list and we will pull the patches in that way.
>
> Thanks,
> Brad
>

Brad,

Okay and will do.

-- 
Cheers,
Alex Hung




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