From: Ash Willis Date: Wed, 29 May 2013 01:27:59 +0000 (+0000) Subject: ACPI / video: ignore BIOS initial backlight value for HP Pavilion g6 X-Git-Tag: v3.0.82~8 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87646a0da17e5368db84a14c506e9df588051acf;p=thirdparty%2Fkernel%2Fstable.git 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: Greg Kroah-Hartman --- diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 300266139fcf9..6f42a5dc1dab7 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -448,6 +448,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 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 Pavilion m4",