Facilitate override on minimum brightness level
@aurabindo
Submitted by Aurabindo J Assigned to Intel GFX Bugs mailing list
Description
Created attachment 110359
/sys/kernel/debug/dri/0/i915_opregion
Recent changes made the minimum allowed brightness level from 0 to an arbitrary value of 25% (of Max value).
Such an arbitrary value may not be suitable for all users alike. However, it also fixes some issues on a few hardware. Hence facilitate an override for systems that work sanely without limit on minimum brightneess.
Mailing list thread: http://www.gossamer-threads.com/lists/linux/kernel/2060904
Associated commit:
commit e1c412e75754ab7b7002f3e18a2652d999c40d4b
Author: Jani Nikula jani.nikula@intel.com
Date: Wed Nov 5 14:46:31 2014 +0200
drm/i915: safeguard against too high minimum brightness
Never trust (your interpretation of) the VBT. Regression from
commit 6dda730e55f412a6dfb181cae6784822ba463847
Author: Jani Nikula jani.nikula@intel.com
Date: Tue Jun 24 18:27:40 2014 +0300
drm/i915: respect the VBT minimum backlight brightness
Attachment 110359, "/sys/kernel/debug/dri/0/i915_opregion":
opregion