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| author | Hans de Goede <hdegoede@redhat.com> | 2014-10-22 16:06:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:48:01 -0800 |
| commit | 018fd7f83f65eed43a6c655686e05c95bab03637 (patch) | |
| tree | c3389cff9a13947b8ed3745ae1491350b18666dc /drivers | |
| parent | f693fddf24d1808a835b15c72c04d30c2df1e6e7 (diff) | |
| download | lwn-018fd7f83f65eed43a6c655686e05c95bab03637.tar.gz lwn-018fd7f83f65eed43a6c655686e05c95bab03637.zip | |
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')
| -rw-r--r-- | drivers/platform/x86/acer-wmi.c | 11 |
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"), + }, + }, {} }; |