[Bug 71101] New: Intel screen backlight control not working

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=71101

            Bug ID: 71101
           Summary: Intel screen backlight control not working
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.14-rc4
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jibi.lolwut at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Starting with kernel 3.14 intel backlight control no longer works.
More specifically sysfs no longer works:

# echo [some value] > /sys/class/backlight/intel_backlight/brightness

does not produce any change in the screen backlight.

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