[Bug 78011] New: laptop panel backlight is dropped to 0 when external VGA display is connected

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=78011

            Bug ID: 78011
           Summary: laptop panel backlight is dropped to 0 when external
                    VGA display is connected
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.15.0
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: anton.gubarkov at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Actual behavior:
Every time I connect an external display, my internal panel brightness is
brought to 0. 

Expected behavior:
The internal panel brightness doesn't change when there is a desktop displayed
on it.

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