From: Hans de Goede Date: Wed, 22 Oct 2014 14:06:38 +0000 (+0200) Subject: acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80 X-Git-Tag: Tizen_Studio_1.3_Release_p3.0~100^2~11^2~132 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=77a16ea5d9f0a4249ce57c1eca8c4646ef99acbd;p=sdk%2Femulator%2Femulator-kernel.git acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80 commit 183fd8fcd7f8afb7ac5ec68f83194872f9fecc84 upstream. The acpi-video backlight interface on the Acer KAV80 is broken, and worse it causes the entire machine to slow down significantly after a suspend/resume. Blacklist it, and use the acer-wmi backlight interface instead. Note that the KAV80 is somewhat unique in that it is the only Acer model where we fall back to acer-wmi after blacklisting, rather then using the native (e.g. intel) backlight driver. This is done because there is no native backlight interface on this model. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1128309 Signed-off-by: Hans de Goede Signed-off-by: Darren Hart Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index c91f69b3..dcfcaea 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -570,6 +570,17 @@ static const struct dmi_system_id video_vendor_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), }, }, + { + /* + * Note no video_set_backlight_video_vendor, we must use the + * acer interface, as there is no native backlight interface. + */ + .ident = "Acer KAV80", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), + }, + }, {} };