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| author | Marcos Paulo Medeiros <maarcospm1996@gmail.com> | 2026-07-27 10:21:51 -0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-08-05 19:14:14 +0200 |
| commit | 525ba51157ac6e1772b5412eae26b20dd7ef8bda (patch) | |
| tree | a5dbac451f9273b5d1206fb79f6e3bf441ff769d | |
| parent | b0572550d83d84fa4d7e9088164ac528c5d82996 (diff) | |
| download | linux-525ba51157ac6e1772b5412eae26b20dd7ef8bda.tar.gz linux-525ba51157ac6e1772b5412eae26b20dd7ef8bda.zip | |
ACPI: video: force native backlight on Acer Nitro AN515-46
The Acer Nitro AN515-46 is a hybrid graphics laptop whose internal
panel is driven by the AMD GPU (Radeon 680M); the discrete NVIDIA GPU
only drives external outputs. The firmware nevertheless advertises the
NVIDIA WMI EC backlight GUID, so the backlight type resolves to
nvidia_wmi_ec. The nvidia-wmi-ec-backlight driver however fails to
probe ("EC backlight control failed: AE_NOT_FOUND") and, since the
backlight type is still nvidia_wmi_ec, amdgpu skips registering its
own backlight device. The result is no backlight device at all,
leaving the brightness keys and the desktop brightness slider
non-functional.
Booting with acpi_backlight=native makes amdgpu register its backlight
interface and brightness control works. Add a DMI quirk to use the
native backlight on this model by default.
Signed-off-by: Marcos Paulo Medeiros <maarcospm1996@gmail.com>
Link: https://patch.msgid.link/20260727132151.12792-1-maarcospm1996@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/video_detect.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 5b0dc679e322..07755b856973 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -919,6 +919,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "OMEN by HP Gaming Laptop 16-n0xxx"), }, }, + { + .callback = video_detect_force_native, + /* Acer Nitro AN515-46 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Nitro AN515-46"), + }, + }, /* * x86 android tablets which directly control the backlight through |