From: Alex Hung <alex.hung@canonical.com>
Date: Mon, 6 May 2013 08:23:43 +0000 (+0000)
Subject: ACPI video: ignore BIOS initial backlight value for HP 1000
X-Git-Tag: v3.2.47~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36466ac6c36c955ec1e4eaf8f4ed6a192f430f9a;p=thirdparty%2Fkernel%2Fstable.git

ACPI video: ignore BIOS initial backlight value for HP 1000

commit 4ef366c583d6180b1c951147869ee5a3038834f2 upstream.

On HP 1000 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/1167760
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index d641a22d94aaf..464daf8cffbef 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -455,6 +455,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
 		},
 	},
+	{
+	 .callback = video_ignore_initial_backlight,
+	 .ident = "HP 1000 Notebook PC",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"),
+		},
+	},
 	{}
 };