This is a note to let you know that I've just added the patch titled
Revert "ACPI / video: Add force_native quirk for HP Pavilion dv6"
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-acpi-video-add-force_native-quirk-for-hp-pavilion-dv6.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fd25ea29093e275195d0ae8b2573021a1c98959f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sun, 22 Jan 2017 13:24:05 +0100
Subject: Revert "ACPI / video: Add force_native quirk for HP Pavilion dv6"
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit fd25ea29093e275195d0ae8b2573021a1c98959f upstream.
Revert commit 6276e53fa8c0 (ACPI / video: Add force_native quirk for
HP Pavilion dv6).
In the commit message for the quirk this revert removes I wrote:
"Note that there are quite a few HP Pavilion dv6 variants, some
woth ATI and some with NVIDIA hybrid gfx, both seem to need this
quirk to have working backlight control. There are also some versions
with only Intel integrated gfx, these may not need this quirk, but it
should not hurt there."
Unfortunately that seems wrong, I've already received 2 reports of
this commit causing regressions on some dv6 variants (at least one
of which actually has a nvidia GPU). So it seems that HP has made a
mess here by using the same model-name both in marketing and in the
DMI data for many different variants. Some of which need
acpi_backlight=native for functional backlight control (as the
quirk this commit reverts was doing), where as others are broken by
it. So lets get back to the old sitation so as to avoid regressing
on models which used to work without any kernel cmdline arguments
before.
Fixes: 6276e53fa8c0 (ACPI / video: Add force_native quirk for HP Pavilion dv6)
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/video_detect.c | 11 -----------
1 file changed, 11 deletions(-)
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -314,17 +314,6 @@ static const struct dmi_system_id video_
DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
},
},
- {
- /* https://bugzilla.redhat.com/show_bug.cgi?id=1204476 */
- /* https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1416940 */
- .callback = video_detect_force_native,
- .ident = "HP Pavilion dv6",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv6 Notebook PC"),
- },
- },
-
{ },
};
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.9/revert-acpi-video-add-force_native-quirk-for-hp-pavilion-dv6.patch
