https://bugzilla.novell.com/show_bug.cgi?id=841644
https://bugzilla.novell.com/show_bug.cgi?id=841644#c2
Joey Lee changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
InfoProvider| |soshial.reg@gmail.com
--- Comment #2 from Joey Lee 2013-09-29 13:06:03 UTC ---
Hi,
Please try 'acpi_backlight=vendor' kernel parameter. It will fallback to Intel
video driver for control backlight.
We try to move all Windows 8 machine to run Intel video driver path because
more and more manufacturers didn't test ACPI interface due to follow Microsoft
WDDM spec.
Unfortunately we found some issue causes by Intel video driver doesn't well
take care the backlight, it causes Linus revoke patch in v3.11 kernel.
Anyway, before Intel video driver fix issue, on those machine that has broken
ACPI method. The way to try it is:
+ first: try 'acpi_backlight=vendor'
+ second: try acpi_osi="!Windows 2012"
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