From b0222e222d773208a4cd0d76d52cf8987034ff37 Mon Sep 17 00:00:00 2001 From: Werner Sembach Date: Tue, 15 Mar 2022 20:02:28 +0100 Subject: ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU commit c844d22fe0c0b37dc809adbdde6ceb6462c43acf upstream. Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a working native and video interface. However the default detection mechanism first registers the video interface before unregistering it again and switching to the native interface during boot. This results in a dangling SBIOS request for backlight change for some reason, causing the backlight to switch to ~2% once per boot on the first power cord connect or disconnect event. Setting the native interface explicitly circumvents this buggy behaviour by avoiding the unregistering process. Signed-off-by: Werner Sembach Cc: All applicable Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/video_detect.c | 75 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) (limited to 'drivers') diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index e7978d983b26..de4142723ff4 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -372,6 +372,81 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), }, }, + /* + * Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a + * working native and video interface. However the default detection + * mechanism first registers the video interface before unregistering + * it again and switching to the native interface during boot. This + * results in a dangling SBIOS request for backlight change for some + * reason, causing the backlight to switch to ~2% once per boot on the + * first power cord connect or disconnect event. Setting the native + * interface explicitly circumvents this buggy behaviour, by avoiding + * the unregistering process. + */ + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "AURA1501"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, /* * Desktops which falsely report a backlight and which our heuristics -- cgit v1.2.3