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authorAlex Hung <alex.hung@canonical.com>2013-05-28 02:05:09 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-01 23:52:28 +0200
commitfedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c (patch)
tree1080bf4644007de8a2a588ac079d299608efde4b /drivers/acpi
parentaf1d486c18bad7820b0ca52b413458914231102c (diff)
downloadvexpress-lsk-fedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c.tar.gz
ACPI / video: ignore BIOS initial backlight value for HP m4
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 Cc: All <stable@vger.kernel.org> Signed-off-by: Alex Hung <alex.hung@canonical.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/video.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5b32e15a65c..d0937ab3fb6 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -464,6 +464,14 @@ 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 m4",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"),
+ },
+ },
{}
};