drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)
commit c675949e Author: Jani Nikula <jani.nikula@intel.com> Date: Wed Apr 9 11:31:37 2014 +0300 drm/i915: do not setup backlight if not available according to VBT prevents backlight setup on the Acer C720 (Core i3 4005U CPU), which has a misconfigured VBT. Apply quirk to ignore the VBT backlight presence check during backlight setup. Signed-off-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Tyler Cleveland <siralucardt@openmailbox.org> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org (3.15+) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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