The TongFang GKxNRxx, GMxNGxx, GMxZGxx, and GMxRGxx / TUXEDO
Stellaris/Polaris Gen 1-4, have the same problem as the Clevo NL5xRU and
NL5xNU / TUXEDO Aura 15 Gen1 and Gen2:
They have a working native and video interface for screen backlight.
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.
The upstream commit "ACPI: video: Make backlight class device registration
a separate step (v2)" changes the logic in a way that these quirks are not
required anymore, but kernel <= 6.0 still need these.
Signed-off-by: Werner Sembach<wse@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/video_detect.c | 64 +++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 3b972ca53689..e5518b88f710 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -463,6 +463,70 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_BOARD_NAME, "PF5LUXG"),
},
},
+ /*
+ * More Tongfang devices with the same issue as the Clevo NL5xRU and
+ * NL5xNU/TUXEDO Aura 15 Gen1 and Gen2. See the description above.
+ */
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GKxNRxx",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "GKxNRxx"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GKxNRxx",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
+ DMI_MATCH(DMI_BOARD_NAME, "POLARIS1501A1650TI"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GKxNRxx",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
+ DMI_MATCH(DMI_BOARD_NAME, "POLARIS1501A2060"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GKxNRxx",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
+ DMI_MATCH(DMI_BOARD_NAME, "POLARIS1701A1650TI"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GKxNRxx",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
+ DMI_MATCH(DMI_BOARD_NAME, "POLARIS1701A2060"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GMxNGxx",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "GMxNGxx"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GMxZGxx",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "GMxZGxx"),
+ },
+ },
+ {
+ .callback = video_detect_force_native,
+ .ident = "TongFang GMxRGxx",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
+ },
+ },
/*
* Desktops which falsely report a backlight and which our heuristics
* for this do not catch.
