[3.16.y-ckt stable] Patch "acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Mon Nov 24 15:00:22 UTC 2014
This is a note to let you know that I have just added a patch titled
acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt2.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From a63b972a7293181f21e4b74dbc102e158b6f51fa Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede at redhat.com>
Date: Wed, 22 Oct 2014 16:06:38 +0200
Subject: 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 at redhat.com>
Signed-off-by: Darren Hart <dvhart at linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/platform/x86/acer-wmi.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index bbf78b2d6d93..5eeddc00f210 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -578,6 +578,17 @@ static const struct dmi_system_id video_vendor_dmi_table[] = {
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"),
+ },
+ },
{}
};
--
2.1.0
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