]> www.infradead.org Git - users/dwmw2/linux.git/commit
ACPI: video: Use native backlight on Acer TravelMate 5735Z
authorPaul Menzel <pmenzel@molgen.mpg.de>
Fri, 22 May 2020 12:22:28 +0000 (14:22 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 22 Jun 2020 07:32:49 +0000 (09:32 +0200)
commitddae8d032696e9eccd386f00d277b176de062e60
tree80787dfe7e61b42ab7a2139fb8b780aaa706f933
parentffc31bc2623232e15396a74ab7b48332442d0bdb
ACPI: video: Use native backlight on Acer TravelMate 5735Z

[ Upstream commit c41c36e900a337b4132b12ccabc97f5578248b44 ]

Currently, changing the brightness of the internal display of the Acer
TravelMate 5735Z does not work. Pressing the function keys or changing the
slider, GNOME Shell 3.36.2 displays the OSD (five steps), but the
brightness does not change.

The Acer TravelMate 5735Z shipped with Windows 7 and as such does not
trigger our "win8 ready" heuristic for preferring the native backlight
interface.

Still ACPI backlight control doesn't work on this model, where as the
native (intel_video) backlight interface does work by adding
`acpi_backlight=native` or `acpi_backlight=none` to Linux’ command line.

So, add a quirk to force using native backlight control on this model.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=207835
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/acpi/video_detect.c