https://bugzilla.kernel.org/show_bug.cgi?id=56711

           Summary: ASUS N56VJ Screen Brightness keys not working
                    correctly
           Product: ACPI
           Version: 2.5
    Kernel Version: 3.8 git
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Video
        AssignedTo: acpi_power-vi...@kernel-bugs.osdl.org
        ReportedBy: dan.gar...@gmail.com
        Regression: No


Running Ubuntu kernel 3.8.0-17.27 (apparently based off 3.8.5).

wKeys Working better than ever before, definitely - the fn-f5 and fn-f6 buttons
now changing with gnome/unity indications for the first time - though the range
is only between 85% and 96% according to `cat
/sys/class/backlight/acpi_video0/brightness` - only those two discrete values.

(Aaron: "That probably is due to the broken implementation of _BQC in this
system's BIOS.")

(Ubuntu settings panel brightness control works fine, 0-100%. No dimming on
battery discharge though :( )


root@guava:~# ls -al /sys/class/backlight/
total 0
lrwxrwxrwx  1 root root 0 Apr 12 00:10 acpi_video0 ->
../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
lrwxrwxrwx  1 root root 0 Apr 12 00:14 intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight


echo x > /sys/class/backlight/acpi_video0/brightness

also works fine, values 0-100.

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