diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2023-01-19 19:37:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-01 10:34:44 +0300 |
| commit | aa9483b9454730908892c3e8b0b06810209667c0 (patch) | |
| tree | cfe423dd2484eb6dbb40788f64e964234dc2a6a3 /drivers/acpi/acpica/utalloc.c | |
| parent | ed796e0916a8498b8511d80ddfe0355a58fe5730 (diff) | |
| download | linux-aa9483b9454730908892c3e8b0b06810209667c0.tar.xz | |
ACPI: video: Add backlight=native DMI quirk for HP EliteBook 8460p
[ Upstream commit 9dcb34234b8235144c96103266317da33321077e ]
The HP EliteBook 8460p predates Windows 8, so it defaults to using
acpi_video# for backlight control.
Starting with the 6.1.y kernels the native radeon_bl0 backlight is hidden
in this case instead of relying on userspace preferring acpi_video# over
native backlight devices.
It turns out that for the acpi_video# interface to work on
the HP EliteBook 8460p, the brightness needs to be set at least once
through the native interface, which now no longer is done breaking
backlight control.
The native interface however always works without problems, so add
a quirk to use native backlight on the EliteBook 8460p to fix this.
Fixes: fb1836c91317 ("ACPI: video: Prefer native over vendor")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2161428
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi/acpica/utalloc.c')
0 files changed, 0 insertions, 0 deletions