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authorHans de Goede <hdegoede@redhat.com>2014-10-22 16:06:38 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-14 08:48:01 -0800
commit018fd7f83f65eed43a6c655686e05c95bab03637 (patch)
treec3389cff9a13947b8ed3745ae1491350b18666dc /drivers/platform/x86
parentf693fddf24d1808a835b15c72c04d30c2df1e6e7 (diff)
downloadlinux-linaro-stable-018fd7f83f65eed43a6c655686e05c95bab03637.tar.gz
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 <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/platform/x86')
-rw-r--r--drivers/platform/x86/acer-wmi.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index c9076bdaf2c1..59a8d325a697 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -572,6 +572,17 @@ 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"),
+ },
+ },
{}
};