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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 - Screen Flickering i915 with drm-nightly"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99709">99709</a>
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<th>Summary</th>
<td>Screen Flickering i915 with drm-nightly
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>XOrg 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>rami.vanguri@gmail.com
</td>
</tr>
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<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=129403" name="attach_129403" title="dmesg output with drm.debug=14 on">attachment 129403</a> <a href="attachment.cgi?id=129403&action=edit" title="dmesg output with drm.debug=14 on">[details]</a></span>
dmesg output with drm.debug=14 on
Summary of the problem:
Screen flickering under highest resolution (3840x2160) with external
monitor connected to DisplayPort. This is with an X1 Carbon (3rd
generation) and flickering only happens on external monitor and only
on highest resolution. This is with drm-nightly from 2-6-2017. On older
kernels there was a FIFO underrun message but that no longer appears.
Kernel version (from /proc/version):
Linux version 4.10.0-994-generic (kernel@gomeisa) (gcc version 6.2.0
20161005 (Ubuntu 6.2.0-5ubuntu12) ) #201702052101 SMP Mon Feb 6
02:02:51 UTC 2017
Attached is dmesg.txt with drm.debug=14 on.</pre>
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