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authorHans de Goede <hdegoede@redhat.com>2014-10-22 18:06:38 +0400
committerDarren Hart <dvhart@linux.intel.com>2014-10-28 07:45:13 +0300
commit183fd8fcd7f8afb7ac5ec68f83194872f9fecc84 (patch)
tree6a314dbab62390058e1f96191f41e9bfaed5b893 /drivers/platform
parent5a1426c99f9b7aa11d60c4e6b7a3211bb5321696 (diff)
downloadlinux-183fd8fcd7f8afb7ac5ec68f83194872f9fecc84.tar.xz
acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80
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 Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/platform')
-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 96a0b75c52c9..26c4fd1394da 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -579,6 +579,17 @@ static const struct dmi_system_id video_vendor_dmi_table[] __initconst = {
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
},
},
+ {
+ /*
+ * 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"),
+ },
+ },
{}
};