[PATCH 0/1][quantal/raring] Fix broken backlight controls on Samsung N250P

[Seth Forshee]

I had expected to see this patch in 3.8, but it seems no pull request
was sent for platform-drivers-x86. It's a trivial patch to add a quirk
for this machine and has an ack from the samsung-laptop maintainer, so
it's just a matter of time before it gets upstream. I propose we carry
it as a sauce patch until that happens.


== SRU Justification ==

Impact: The standard ACPI backlight interfaces on this machine fail to
change the screen brightness. There is an alternate interface supported
by the samsung-laptop module that does work, but since userspace prefers
acpi_video the hotkeys and UI for adjusting screen brightness fail to
work.

Fix: This problem is common enough on Samsung machines that
samsung-laptop contains a dmi list of machines which need the acpi_video
backlight disabled. Add this machine to that list.

Test Case: Using a driver with the quirk added results in working
backlight controls. Tested on LP#1086921.


Seth Forshee (1):
  UBUNTU: SAUCE: samsung-laptop: Add quirk for broken acpi_video
    backlight on N250P

 drivers/platform/x86/samsung-laptop.c |   10 ++++++++++
 1 file changed, 10 insertions(+)