This is a note to let you know that I've just added the patch titled
ACPI / video: ignore BIOS initial backlight value for HP m4
to the 3.4-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:
acpi-video-ignore-bios-initial-backlight-value-for-hp-m4.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c Mon Sep 17 00:00:00 2001
From: Alex Hung <alex.hung@xxxxxxxxxxxxx>
Date: Tue, 28 May 2013 02:05:09 +0000
Subject: ACPI / video: ignore BIOS initial backlight value for HP m4
From: Alex Hung <alex.hung@xxxxxxxxxxxxx>
commit fedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c upstream.
On HP m4 lapops, BIOS reports minimum backlight on boot and
causes backlight to dim completely. This ignores the initial backlight
values and set to max brightness.
References: https://bugs.launchpad.net/bugs/1184501
Signed-off-by: Alex Hung <alex.hung@xxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/video.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -447,6 +447,14 @@ static struct dmi_system_id video_dmi_ta
DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
},
},
+ {
+ .callback = video_ignore_initial_backlight,
+ .ident = "HP Pavilion m4",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"),
+ },
+ },
{}
};
Patches currently in stable-queue which might be from alex.hung@xxxxxxxxxxxxx are
queue-3.4/acpi-video-ignore-bios-initial-backlight-value-for-hp-m4.patch
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