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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Laptop main panel goes blank when the mouse cursor is in it while an external monitor is plugged in"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96686">96686</a>
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<th>Summary</th>
<td>Laptop main panel goes blank when the mouse cursor is in it while an external monitor is plugged in
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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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
</td>
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>roc@ocallahan.org
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Dell XPS 9550 laptop (Skylake). I have various graphics issues but currently
the most serious one is that usually when I plug an external monitor (Dell 4K)
into the HDMI port, the main laptop screen goes blank whenever the mouse cursor
is in it.
I'm using the full 4K resolution of the external monitor so it only runs at
30Hz given the HDMI limitation.
uname -a:
Linux glory 4.5.7-300.fc24.x86_64 #1 SMP Wed Jun 8 18:12:45 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
Kernel command line parameters added:
nouveau.modeset=0 acpi_osi=Linux i915.enable_rc6=0
Repeated attempts to unplug and replug the external monitor eventually resolve
the issue (until the next time I need to move my laptop).
dmesg shows "WARN_ON(!wm_changed)" on every replug but my symptoms aren't
mentioned by other users reporting that issue, hence this new bug report.</pre>
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