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| author | Ash Willis <ashwillis.kernel@gmail.com> | 2013-05-29 01:27:59 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-13 09:25:07 -0700 |
| commit | 87646a0da17e5368db84a14c506e9df588051acf (patch) | |
| tree | 143476ed23ba1ba9e34728c449509b7641350491 | |
| parent | d117eaaa99ceedbf4c73a6dabf2f92d330c3b71b (diff) | |
| download | lwn-87646a0da17e5368db84a14c506e9df588051acf.tar.gz lwn-87646a0da17e5368db84a14c506e9df588051acf.zip | |
ACPI / video: ignore BIOS initial backlight value for HP Pavilion g6
commit 780a6ec640a3fed671fc2c40e4dd30c03eca3ac3 upstream.
This patch addresses kernel bug 56661. BIOS reports an incorrect
backlight value, causing the driver to switch off the backlight
completely during startup. This patch ignores the incorrect value from
BIOS.
References: https://bugzilla.kernel.org/show_bug.cgi?id=56661
Signed-off-by: Ash Willis <ashwillis@programmer.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/acpi/video.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 300266139fcf..6f42a5dc1dab 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -450,6 +450,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { }, { .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion g6 Notebook PC", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), + }, + }, + { + .callback = video_ignore_initial_backlight, .ident = "HP Pavilion m4", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), |