>From 117af51d695c78bfdf618a183664f0e9f3769b9a Mon Sep 17 00:00:00 2001 From: Zhang Rui <rui.zhang@xxxxxxxxx> Date: Sun, 2 Dec 2012 10:00:41 +0800 Subject: [PATCH] ACPI video: ignore BIOS initial backlight value for HP Folio 13-2000 Or else the laptop will boot with a dimmed screen. https://bugzilla.kernel.org/show_bug.cgi?id=51141 Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx> Tested-by: Stefan Nagy <public@xxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx --- drivers/acpi/video.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 1e0a9e1..58bddd3 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -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"), + }, + }, {} }; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
