The Dell Precision 7510 has a broken acpi-video implementation.
The backlight control bits work, but when the brightness is changed via
the acpi-video interface the backlight flickers annoyingly before settling
at the new brightness, switching to using the native interface fixes the
flickering so add a quirk for this (the vendor interface can not change the
brightness at all).
Signed-off-by: Shih-Yuan Lee (FourDollars) <sylee@xxxxxxxxxxxxx>
---
drivers/acpi/video_detect.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 7f48156..d179e8d 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -305,6 +305,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
},
},
+ {
+ .callback = video_detect_force_native,
+ .ident = "Dell Precision 7510",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
+ },
+ },
{ },
};
--
2.7.4
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