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

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

From: Ash Willis <[email protected]>

commit 780a6ec640a3fed671fc2c40e4dd30c03eca3ac3 upstream.

This patch addresses kernel bug 56661. BIOS reports an incorrect
backlight value, causing the driver to switch off the backlight
completely during startup. This patch ignores the incorrect value from
BIOS.

References: https://bugzilla.kernel.org/show_bug.cgi?id=56661
Signed-off-by: Ash Willis <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Luis Henriques <[email protected]>
---
 drivers/acpi/video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a4d9f5d..403283d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -457,6 +457,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = 
{
        },
        {
         .callback = video_ignore_initial_backlight,
+        .ident = "HP Pavilion g6 Notebook PC",
+        .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+                DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"),
+               },
+       },
+       {
+        .callback = video_ignore_initial_backlight,
         .ident = "HP 1000 Notebook PC",
         .matches = {
                DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
-- 
1.8.1.2

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