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 Folio 13-2000
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-folio-13-2000.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 <[email protected]> know about it.
>From 129ff8f8d58297b04f47b5d6fad81aa2d08404e1 Mon Sep 17 00:00:00 2001
From: Zhang Rui <[email protected]>
Date: Tue, 4 Dec 2012 23:30:19 +0100
Subject: ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000
From: Zhang Rui <[email protected]>
commit 129ff8f8d58297b04f47b5d6fad81aa2d08404e1 upstream.
Or else the laptop will boot with a dimmed screen.
References: https://bugzilla.kernel.org/show_bug.cgi?id=51141
Tested-by: Stefan Nagy <[email protected]>
Signed-off-by: Zhang Rui <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/acpi/video.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -389,6 +389,12 @@ static int __init video_set_bqc_offset(c
return 0;
}
+static int video_ignore_initial_backlight(const struct dmi_system_id *d)
+{
+ use_bios_initial_backlight = 0;
+ return 0;
+}
+
static struct dmi_system_id video_dmi_table[] __initdata = {
/*
* Broken _BQC workaround
http://bugzilla.kernel.org/show_bug.cgi?id=13121
@@ -433,6 +439,14 @@ static struct dmi_system_id video_dmi_ta
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
},
},
+ {
+ .callback = video_ignore_initial_backlight,
+ .ident = "HP Folio 13-2000",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
+ },
+ },
{}
};
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/acpi-video-ignore-bios-initial-backlight-value-for-hp-folio-13-2000.patch
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