[Bug 68471] New: Display extremely dark on Dell XPS 13 since 3.10 Kernel in EFI mode

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=68471

            Bug ID: 68471
           Summary: Display extremely dark on Dell XPS 13 since 3.10
                    Kernel in EFI mode
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.13.0-0.rc7.git3.1.fc21.x86_64
          Hardware: All
                OS: Linux
              Tree: Fedora
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: dennisml at conversis.de
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Any kernel >= 3.10 results in the display ending up extremely dark and
brightness cannot be change using the keys when booting using UEFI.
After doing some research it seems there are various backlight issues but I'm
not sure which issue exactly I'm dealing with here and what to do about it.
Right now I cannot update my kernel or upgrade my distribution because of this.

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