[Bug 81515] [IVB Regression] Backlight is not adjustable and set at maximum level in kernels 3.16-rcX on HD 4000
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Mon Aug 18 00:49:52 PDT 2014
https://bugs.freedesktop.org/show_bug.cgi?id=81515
Jani Nikula <jani.nikula at intel.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aaron.lu at intel.com
--- Comment #11 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #7)
> Finally I found a workaround ( had to go and see the code for an appropriate
> kernel parameter). So with video.use_native_backlight=-1 (not sure what it
> really means) the backlight works as before. The /sys/class/backlight folder
> also contains:
> acpi_video0 acpi_video1 intel_backlight.
CC Aaron, seems like acpi backlight is required on this one.
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