[Bug 93772] 4k eDP display blanks on intel-drm-nightly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93772

--- Comment #3 from Elio <elio.martinez.monroy at intel.com> ---
Hello,

I just tried to reproduce the problem with following configuration:

BDW-U NUC, emulating eDP with external Display (HP ZR24w) 1920 x 1200 as
principal display

Attaching a 4k display (3840x2160). 

OS: Ubuntu 16.04
Kernel: 4.7.0 rc2
DM: LightDRM as default for Plasma5 (KDE).

I'm able to log in but i got 2 blank screens at the begining in clone mode
(cursor is being show).

Trying to reboot system, it shows the logoff screen.

Able to get back to Ubuntu normally.




++ Date : jun-WW24-01-11:31:29 

 --> Component : drm 
         url : http://cgit.freedesktop.org/mesa/drm 
         tag : libdrm-2.4.68 
         commit : fc09c5a 
         author : Kenneth Graunke <kenneth at whitecape.org> 
         age : 6 weeks ago 
 --> Component : mesa 
         url : http://cgit.freedesktop.org/mesa/mesa 
         tag : mesa-11.2.2 
         commit : 3a9f628 
         author : Emil Velikov <emil.velikov at collabora.com> 
         age : 4 weeks ago 
 --> Component : xf86-video-intel 
         url : http://cgit.freedesktop.org/xorg/driver/xf86-video-intel 
         tag : 2.99.917 
         commit : baec802 
         author : Chris Wilson <chris at chris-wilson.co.uk> 
         age : 1 year 6 months ago 
 --> Component : libva 
         url : http://cgit.freedesktop.org/libva/ 
         tag : libva-1.7.1.pre1 
         commit : 453876f 
         author : Xiang Haihao <haihao.xiang at intel.com> 
         age : 4 days ago 
 --> Component : vaapi (intel-driver) 
         url : http://cgit.freedesktop.org/vaapi/intel-driver 
         tag : 1.7.1.pre1 
         commit : 2975480 
         author : Xiang Haihao <haihao.xiang at intel.com> 
         age : 4 days ago 
 --> Component : cairo 
         url : http://cgit.freedesktop.org/cairo 
         tag : 1.15.2 
         commit : db8a7f1 
         author : Bryce Harrington <bryce at osg.samsung.com> 
         age : 6 months ago 
 --> Component : xserver 
         url :  http://cgit.freedesktop.org/xorg/xserver 
         tag : xorg-server-1.18.3 
         commit : 9454cd5 
         author : Adam Jackson <ajax at redhat.com> 
         age : 9 weeks ago 
 --> Component : intel-gpu-tools 
         url : http://cgit.freedesktop.org/xorg/app/intel-gpu-tools 
         tag : intel-gpu-tools-1.15 
         commit : 3ce58b6 
         author : Marius Vlad <marius.c.vlad at intel.com>

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