| From | Ben Hutchings <> | Date | Sun, 16 Jun 2013 23:01:38 +0100 | Subject | [47/83] ACPI / video: ignore BIOS initial backlight value for HP m4 |
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3.2.47-rc1 review patch. If anyone has any objections, please let me know.
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From: Alex Hung <alex.hung@canonical.com>
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: Ben Hutchings <ben@decadent.org.uk> --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -463,6 +463,14 @@ static struct dmi_system_id video_dmi_ta 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"), + }, + }, {} };
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