[Bug 75441] New: Screen Brightness Control on XPS-13 Inoperative

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=75441

            Bug ID: 75441
           Summary: Screen Brightness Control on XPS-13 Inoperative
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.14.2-200.fc20.x86_64
          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: gtwilliams at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

This is a regression.

Brightness control stopped working on Dell XPS-13 after installing
3.14.2-200.fc20.x86_64.  Previous kernel was 3.13.10-200.fc20.x86_64.
OSD shows changes when Fn-F[45] are pressed or when idle kicks in
dimming, but actual screen brightness remains unchanged.

Also reported here:

    https://bugzilla.redhat.com/show_bug.cgi?id=1093764

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