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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW] Hot unplug VGA EFP from docking then plug in, find EFP cannot be detected anymore"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87736">87736</a>
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<th>Summary</th>
<td>[BDW] Hot unplug VGA EFP from docking then plug in, find EFP cannot be detected anymore
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>phidias.chiang@canonical.com
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=111357" name="attach_111357" title="error message when unplugging VGA cable in 3.13.0-34 kernel">attachment 111357</a> <a href="attachment.cgi?id=111357&action=edit" title="error message when unplugging VGA cable in 3.13.0-34 kernel">[details]</a></span>
error message when unplugging VGA cable in 3.13.0-34 kernel
[Summary]
Hot unplug VGA EFP from docking then plug in, find EFP cannot be detected any
more.
[Steps]
1. Boot up the system with docking
2. Plug the VGA port
3. Fn+F4 to trigger the external monitor display
4. Unplug the VGA port and replug again
5. Check the external monitor
[Expected results]
1. External monitor still can display.
[Actual results]
1. External monitor can't display.
[linux-3.13.0-34-generic]
After unplugging VGA and replugging back, system is blocked
when executing `cat /sys/class/drm/card0-DP-2/status`.
Test with Fn+F4 or running `xrandr` at the moment system hangs.
[linux-3.13.0-38]
After detaching DP and connection VGA,
it probes and outputs to external monitor correctly,
but if unplug VGA and replug again it failed
(disconnected in /sys/class/drm/card0-DP-2/status)</pre>
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