50 lines
1.4 KiB
Diff
50 lines
1.4 KiB
Diff
From: Zhang Rui <rui.zhang@intel.com>
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Date: Tue, 4 Dec 2012 23:30:19 +0100
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Subject: ACPI / video: ignore BIOS initial backlight value for HP Folio
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13-2000
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commit 129ff8f8d58297b04f47b5d6fad81aa2d08404e1 upstream.
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Or else the laptop will boot with a dimmed screen.
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References: https://bugzilla.kernel.org/show_bug.cgi?id=51141
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Tested-by: Stefan Nagy <public@stefan-nagy.at>
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Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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---
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drivers/acpi/video.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
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index 0230cb6..ac9a69c 100644
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--- a/drivers/acpi/video.c
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+++ b/drivers/acpi/video.c
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@@ -389,6 +389,12 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d)
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return 0;
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}
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+static int video_ignore_initial_backlight(const struct dmi_system_id *d)
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+{
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+ use_bios_initial_backlight = 0;
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+ return 0;
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+}
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+
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static struct dmi_system_id video_dmi_table[] __initdata = {
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/*
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* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
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@@ -433,6 +439,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
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},
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},
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+ {
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+ .callback = video_ignore_initial_backlight,
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+ .ident = "HP Folio 13-2000",
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+ .matches = {
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+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
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+ },
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+ },
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{}
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};
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