From 997dd7fe546b33a4f86adc635c5ffc0e79966cf2 Mon Sep 17 00:00:00 2001 From: Stephen Chandler Paul Date: Fri, 4 Apr 2014 10:44:46 -0400 Subject: [PATCH] ACPI / video: Favor native backlight interface for ThinkPad Helix Like many other Windows 8 laptops the ThinkPad Helix's backlight has a broken ACPI interface and can only be properly adjusted by using the video card's native backlight control. This adds the ThinkPad Helix to the list of laptops affected with this issue so that video.use_native_backlight is enabled by default. Signed-off-by: Stephen Chandler Paul Signed-off-by: Rafael J. Wysocki --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 48c7e8af9c96..8b6990e417ec 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -487,6 +487,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), }, }, + { + .callback = video_set_use_native_backlight, + .ident = "Thinkpad Helix", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), + }, + }, { .callback = video_set_use_native_backlight, .ident = "Dell Inspiron 7520",