From: Kirill Tkhai <tkhai@yandex.ru>
Date: Fri, 18 Oct 2013 11:56:44 +0000 (+0400)
Subject: ACPI / video: Ignore BIOS initial backlight value for HP 250 G1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e37f14a5fb85522f3bbf88ece6134c4e610ed598;p=linux-beck.git

ACPI / video: Ignore BIOS initial backlight value for HP 250 G1

On HP 250 G1 laptops, BIOS reports minimum backlight on boot and
causes backlight to dim completely. This ignores the initial backlight
values and set to max brightness.

References: https://bugzilla.kernel.org/show_bug.cgi?id=63111
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index d020df5a732a..38c3a28d6392 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -504,6 +504,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"),
 		},
 	},
+	{
+	 .callback = video_ignore_initial_backlight,
+	 .ident = "HP 250 G1",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "HP 250 G1 Notebook PC"),
+		},
+	},
 	{}
 };