https://bugs.kde.org/show_bug.cgi?id=365455

            Bug ID: 365455
           Summary: Second external monitor does not turn on most of the
                    times
           Product: kwin
           Version: 5.7.0
          Platform: Other
               URL: https://www.youtube.com/watch?v=Vhc85L2PRdI
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-n...@kde.org
          Reporter: darkba...@linuxsystems.it

https://www.youtube.com/watch?v=Vhc85L2PRdI
I made a video to demostrate the problem. I have two external monitors attached
to a single mini displayport MST cable and when I turn on the laptop both
monitors are turned on up to the kdm login. After the login the monitors get
alternately turned off and 100% of the times the right monitors is turned off
when I reach the desktop. Most of the times it is not possibile to turn on that
monitor again, the video shows one of the few times when I had been able to
turn it on using the disable/enable trick.

I'm using Archlinux on Intel Broadwell (DELL XPS 13 9343 +  2 x DELL U2515H on
DP MST). Kernel 4.4 LTS (also tried 4.5 and 4.6). I get this issue with both
xf86-video-intel and modesetting.

Reproducible: Always

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