ACPI / video: ignore BIOS initial backlight value for Fujitsu E753

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@gmail.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 440eadf..0e4b96b 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -450,6 +450,14 @@ 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"),