[Bug 101396] New: [DP] [BDW] Error testing DP_1st_boot_GFX using MST dongle + HDMI + 4K

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101396

            Bug ID: 101396
           Summary: [DP] [BDW] Error testing DP_1st_boot_GFX using MST
                    dongle + HDMI + 4K
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: ricardox.madrigal.maldonado at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 131906
  --> https://bugs.freedesktop.org/attachment.cgi?id=131906&action=edit
dmesg

-------------------------------------------------
==Bug detailed description==
--------------------------------------------------
Default configuration (mini DP to DP) + (DP to DP--4K monitor) + (DP to HDMI ++
4K monitor) + using a MST dongle "sunix" can not boot up 4K display. 

Using: 
1 acer monitor 4K 
1 Asus monitor not 4K

For this test we use different monitors, and different dongles with the sames
results

-------------------------------------------------
==Steps to reproduce==
--------------------------------------------------
1. Connect platform to DP using required dongle
2. Turn device ON

--------------------------------------------------
==Actual results==
--------------------------------------------------
one of two monitors do not send image.

-------------------------------------------------
==Expected results==
--------------------------------------------------
GUI should be displayed without any issues on 2 monitors


--------------------------------------------------
======================================
             Hardware
======================================
platform                   : BDW
motherboard id             : NUC5i7RYB
form factor                : Desktop
cpu family                 : Core i7
cpu family id              : 6
cpu information            : Intel(R) Core(TM) i7-5557U CPU @ 3.10GHz
gpu card                   : Intel Corporation Iris Graphics 6100 (rev 09)
(prog-if 00 [VGA controller])
memory ram                 : 15.58 GB
max memory ram             : 16 GB
display resolution         : 1600x900
cpu thread                 : 4
cpu core                   : 2
cpu model                  : 61
cpu stepping               : 4
socket                     : Socket BGA1168
signature                  : Type 0, Family 6, Model 61, Stepping 4
hard drive                 : 111GiB (120GB)
current cd clock frequency : 337500 kHz
maximum cd clock frequency : 540000 kHz
displays connected         : DP-2

======================================
             Software
======================================
kernel version              : 4.12.0-rc3-drm-tip-ww22-commit-187376e+
architecture                : x86_64
os version                  : Ubuntu 17.04
os codename                 : zesty
kernel driver               : i915
bios revision               : 5.6
bios release date           : 05/11/2017


======================================
              Kernel 
======================================
commit:  187376e


--------------------------------------------------

Attaching dmesg and xrandr --verbose

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