Commit 780a6ec6 authored May 29, 2013 by Ash Willis Committed by Rafael J. Wysocki Jun 01, 2013

ACPI / video: ignore BIOS initial backlight value for HP Pavilion g6

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>
Cc: All <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent fedbe9bc

drivers/acpi/video.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -456,6 +456,14 @@ 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",

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