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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW DP MST] MST mode not working with 4K monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90043">90043</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW DP MST] MST mode not working with 4K monitor
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>XOrg git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hawara@gmail.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=115096" name="attach_115096" title="xrandr --verbose">attachment 115096</a> <a href="attachment.cgi?id=115096&action=edit" title="xrandr --verbose">[details]</a></span>
xrandr --verbose
I have a ThinkPad T550 with Philips Brilliance 288P monitor, connected to mini
displayport.
I'm trying to use 3840x2160 mode at 60hz refresh, which should work through
MST.
But i'm not getting any DP1-1 DP1-2 devices for MST virtual display panels.
I'm running archlinux with 4.0.0-rc7-drm_intel_nightly_20150411 kernel (i've
tried 3.19.3-3-ARCH, and 4.0.0-1 mainline kernel)
xf86-video-intel-git 2.99.917.265.g37ce4dd-1
libdrm-git 2.4.60.31.g6f90b77-1
I'm attaching xrandr --verbose output and dmesg with drm.debug after doing
xrandr --output DP1 --off to motivate monitor to switch to MST mode.
DisplayPort 1.2 in monitor properties is enabled.</pre>
</div>
</p>
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