[PATCH 0/2] [Karmic] SRU: acpi-video: Fix broken _BQC implementations

[Tim Gardner]

Stefan Bader wrote:
> SRU Justification:
> 
> Impact: Sort of caused by allowing partially implemented ACPI video device
> declarations (_DOD but not _DOS) to be considered as valid video devices,
> some run into problems when the (preferred) acpi driver takes control over
> the backlight.
> 
> Fix: Either could be worked around by using "acpi_backlight=vendor" or by
> picking the following two upstream commits which add handling to two
> commonly seen problems (First call to _BQC returns invalid data and _BQC
> being useless as it always returns values other than declared with _BCL).
> 
> Testcase: Affected laptops were unable to control brightness in current
> karmic, but had success with the patched version).
> 
> 

applied

-- 
Tim Gardner tim.gardner at canonical.com