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

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commit 129ff8f8d5 upstream.

Or else the laptop will boot with a dimmed screen.

References: https://bugzilla.kernel.org/show_bug.cgi?id=51141
Tested-by: Stefan Nagy <public@stefan-nagy.at>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zhang Rui
2012-12-04 23:30:19 +01:00
committed by Greg Kroah-Hartman
parent cb2bf59bcc
commit ffedea0f00
1 changed files with 14 additions and 0 deletions
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14
drivers/acpi/video.c
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@@ -390,6 +390,12 @@ 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
@@ -434,6 +440,14 @@ 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"),
},
},
{}
};