diff options
| author | Gustavo Maciel Dias Vieira <gustavo@sagui.org> | 2013-03-04 15:23:37 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-09 10:51:22 -0700 |
| commit | badd9b71c5651a687d042966a5fa8d195e9cffe4 (patch) | |
| tree | fceb0cef425e6cee8b7d9d94cdf4106b73e575c8 | |
| parent | 9e1ba6fccd86b50c3d893e5128515f355df6b066 (diff) | |
ACPI video: ignore BIOS backlight value for HP dm4
commit 771d09b3c4c45d4d534a83a68e6331b97fd82e15 upstream.
On a HP Pavilion dm4 laptop the BIOS sets minimum backlight on boot,
completely dimming the screen. Ignore this initial value for this
machine.
Signed-off-by: Gustavo Maciel Dias Vieira <gustavo@sagui.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
[wyj: Backported to 3.4: adjust context]
Signed-off-by: Yijing Wang <wangyijing@huawei.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 4d608fccee1..8c5ad89a65a 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -471,6 +471,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion dm4", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), + }, + }, {} }; |