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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 - T460s (Skylake): System freeze when attaching a monitor to a Ultra Dock DP connector"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95498">95498</a>
</td>
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<th>Summary</th>
<td>T460s (Skylake): System freeze when attaching a monitor to a Ultra Dock DP connector
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>kaon@posteo.de
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=123925" name="attach_123925" title="dmes">attachment 123925</a> <a href="attachment.cgi?id=123925&action=edit" title="dmes">[details]</a></span>
dmes
Kernel version: drm-intel-nightly @ c6740c9c9e914742fd2ec159142c40701f7df966
(2016-05-18)
Everything else is a stock Fedora 24 install running stock GNOME.
Devices involved:
- Thinkpad T460s (i5-6200U)
- Thinkpad Ultra Dock (latest firmware)
- LG 27MU67-B (3840x2160, DP1.2)
Whenever I connect a monitor to the DP connector on the dock, the system
freezes. I captured the last kmsgs before the freeze using netconsole, see
attachment (drm.debug=0x1e).
A similar issue (probably the same) occurred when I attached a Dell full HD
screen to the DVI port next to the DP connector (they somehow belong together
according to the marking on the dock). System would freeze a few seconds after
attaching the monitor, but the screen would sometimes work before the crash. No
logs though for that, can acquire them if necessary.
Works fine with stock Windows 10 (full resolution, 60hz).
Problem seems to affect other users too:
-
<a href="https://www.reddit.com/r/thinkpad/comments/4c6fea/my_t460s_after_two_weeks_a_heavily_biased/">https://www.reddit.com/r/thinkpad/comments/4c6fea/my_t460s_after_two_weeks_a_heavily_biased/</a>
("The display connectors are currently unusable with Linux and crash the
kernel. This might be addressed with updated Intel drivers, I'm to lazy to
fiddle around with it - so my external monitor runs with an adapter on the
Mini-DP port, which fills up the desk. (Windows handles the connectors without
problems.)")
- <a href="https://bbs.archlinux.org/viewtopic.php?id=210229">https://bbs.archlinux.org/viewtopic.php?id=210229</a>
Any help would be greatly appreciated. I have a working kernel development
setup here and will do whatever is necessary to help with debugging.</pre>
</div>
</p>
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