From 8de5f8abdee26b1dc13e98c401a68637df2ad0dc Mon Sep 17 00:00:00 2001 From: Ash Willis Date: Wed, 29 May 2013 01:27:59 +0000 Subject: [PATCH] ACPI / video: ignore BIOS initial backlight value for HP Pavilion g6 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 Signed-off-by: Rafael J. Wysocki Signed-off-by: Ben Hutchings --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 3451dbd14abc..e19898de38b8 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 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", -- 2.47.3