[PATCH 34/75] ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

[Kamal Mostafa]

3.8.13.6 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lan Tianyu <tianyu.lan at intel.com>

commit 9657a565a476d517451c10b0bcc106e300785aff upstream.

The BIOS of FUjitsu E753 reports an incorrect initial backlight value
for WIN8 compatible OS, causing backlight to be dark during startup.
This change causes the incorrect initial value from BIOS to be ignored.

References: https://bugzilla.kernel.org/show_bug.cgi?id=60161
Reported-and-tested-by: Jan Hinnerk Stosch <janhinnerk.stosch at gmail.com>
Signed-off-by: Lan Tianyu <tianyu.lan at intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/acpi/video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 545246f..5006c47 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -449,6 +449,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 	},
 	{
 	 .callback = video_ignore_initial_backlight,
+	 .ident = "Fujitsu E753",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
+		},
+	},
+	{
+	 .callback = video_ignore_initial_backlight,
 	 .ident = "HP Pavilion dm4",
 	 .matches = {
 		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
-- 
1.8.1.2