| From 183fd8fcd7f8afb7ac5ec68f83194872f9fecc84 Mon Sep 17 00:00:00 2001 |
| From: Hans de Goede <hdegoede@redhat.com> |
| Date: Wed, 22 Oct 2014 16:06:38 +0200 |
| Subject: acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80 |
| |
| From: Hans de Goede <hdegoede@redhat.com> |
| |
| 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> |
| |
| --- |
| drivers/platform/x86/acer-wmi.c | 11 +++++++++++ |
| 1 file changed, 11 insertions(+) |
| |
| --- 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_ |
| 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"), |
| + }, |
| + }, |
| {} |
| }; |
| |
