[Bug 91791] [SKL-U] System hang when a DP MST hub and a DP->VGA adapter/monitor are connected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91791

--- Comment #44 from Elio <elio.martinez.monroy at intel.com> ---
Using the following commit:
commit fb023a2062df06c9e097e1f8f2bcf252194b9413
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon May 30 10:46:14 2016 +0200

    drm-intel-nightly: 2016y-05m-30d-08h-45m-53s UTC integration manifest


Kernel version : 4.6.0
Architecture : source amd64 all

Observations:

Using same displays over DP hub 3-outputs, 1 through DP and 1 through DP-VGA
dongle. 

Xrandr clonning instruction is working fine, no system hang, but this
instruction is not working on Graphic interface (system settings-> display
->mirror displays), it is turning off the secondary display (VGA). 

Error:

"The selected configuration for display could not be applied"
 Could not set the configuration for CRTC 63

"Failed to apply configuration: %s"
Timeout was reached

Once that you try to set up the mirror displays , you need to re-activate on
settings the display and change it to extended mode.


Platform:

SKL-H

OS: Ubuntu 16.04

Attaching Dmesg,Xorg and Kernel log

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