Commit 129ff8f8 authored by Zhang Rui's avatar Zhang Rui Committed by Rafael J. Wysocki
Browse files

ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000 

Or else the laptop will boot with a dimmed screen.

References: https://bugzilla.kernel.org/show_bug.cgi?id=51141


Tested-by: default avatarStefan Nagy <public@stefan-nagy.at>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent b7e38304

drivers/acpi/video.c

+14 −0
Original line number Diff line number Diff line
@@ -389,6 +389,12 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d) 
	return 0;

}



static int video_ignore_initial_backlight(const struct dmi_system_id *d)

{

	use_bios_initial_backlight = 0;

	return 0;

}



static struct dmi_system_id video_dmi_table[] __initdata = {

	/*

	 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
@@ -433,6 +439,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { 
		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),

		},

	},

	{

	 .callback = video_ignore_initial_backlight,

	 .ident = "HP Folio 13-2000",

	 .matches = {

		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),

		DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),

		},

	},

	{}

};