Commits
Jens Reyer committed 3120d03cf64
ACPI / video: Disable native backlight on Samsung Series 9 laptops Add video_disable_native_backlight quirk for SAMSUNG 900X3C/900X3D/ 900X3E/900X4C/900X4D laptops. The native intel backlight controls do not work correctly on SAMSUNG Series 9 (900X3C/900X3D/900X3E/900X4C/900X4D) laptops: One machine has an completely dimmed (= black) display after boot at the GDM login screen and brightness controls work only between 0 and 5% (= no effect). Another machine has the same brightness control issues if an external HDMI monitor is or gets connected, although the initial brightness is ok. After login to Gnome both machines always work fine. Tested on both machines. Link: https://bugs.freedesktop.org/show_bug.cgi?id=87286 Link: https://bugs.debian.org/772440 Signed-off-by: Jens Reyer <jens.reyer@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>