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| author | Alex Hung <alex.hung@canonical.com> | 2013-05-28 02:05:09 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-13 10:49:14 -0700 |
| commit | 6180b5e1367b5d6eee5ae3cfe0c38270a973464f (patch) | |
| tree | 0b48f111eab03cb38f483a6415bc0756bb606b6b | |
| parent | 34c35be12943c8a69d1ef65e875eab34d19fe53f (diff) | |
| download | lwn-6180b5e1367b5d6eee5ae3cfe0c38270a973464f.tar.gz lwn-6180b5e1367b5d6eee5ae3cfe0c38270a973464f.zip | |
ACPI / video: ignore BIOS initial backlight value for HP m4
commit fedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c upstream.
On HP m4 lapops, BIOS reports minimum backlight on boot and
causes backlight to dim completely. This ignores the initial backlight
values and set to max brightness.
References: https://bugs.launchpad.net/bugs/1184501
Signed-off-by: Alex Hung <alex.hung@canonical.com>
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 313f959413dc..80938cb7d0d4 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -447,6 +447,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion m4", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), + }, + }, {} }; |