<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DP] [BDW] Error with display test using MST dongle"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101390">101390</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[DP] [BDW] Error with display test using MST dongle
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ricardox.madrigal.maldonado@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=131894" name="attach_131894" title="dmesg">attachment 131894</a> <a href="attachment.cgi?id=131894&action=edit" title="dmesg">[details]</a></span>
dmesg
-------------------------------------------------
==Bug detailed description==
--------------------------------------------------
When script test start for testing display, screen only show some resolutions
and after that send a blank screen.
If you disconnect and connect the DP from platform, the video works again.
This happen with configuration (mini DP to DP) + (DP to DP) with monitor 4K and
a MST dongle "sunix"
-------------------------------------------------
==Steps to reproduce==
--------------------------------------------------
1. Connect platform to DP using required dongle
2. Turn device ON
3. Enter in text mode and login with your credentials
4. run test "testdisplay -a" or "testdisplay -t" or "testdisplay -d 16" or
"testdisplay -d 24"
--------------------------------------------------
==Actual results==
--------------------------------------------------
Platform only show some resolutions and then send a blank screen.
dmeg shows some linktrainning issues and some FIFO undergrounds:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
-------------------------------------------------
==Expected results==
--------------------------------------------------
Script should start testing IGT and resolutions tested should not have
corruptions, flickering or glitches.
--------------------------------------------------
======================================
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</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>