Patchwork [39/84] ACPI / video: ignore BIOS initial backlight value for HP Pavilion g6

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Submitter Kamal Mostafa
Date June 17, 2013, 5:30 p.m.
Message ID <1371490288-23167-40-git-send-email-kamal@canonical.com>
Download mbox | patch
Permalink /patch/251954/
State New
Headers show

Comments

Kamal Mostafa - June 17, 2013, 5:30 p.m.
3.8.13.3 -stable review patch.  If anyone has any objections, please let me know.

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

From: Ash Willis <ashwillis.kernel@gmail.com>

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 <ashwillis@programmer.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/acpi/video.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Patch

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index afc2a8d..545246f 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"),