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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW GT1] wrong size wm entry cause *ERROR* CPU pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88714">88714</a>
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<th>Summary</th>
<td>[HSW GT1] wrong size wm entry cause *ERROR* CPU pipe A FIFO underrun
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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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
</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>myfoolishgames@gmail.com
</td>
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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>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=112672" name="attach_112672" title="20150122_fifo.log">attachment 112672</a> <a href="attachment.cgi?id=112672&action=edit" title="20150122_fifo.log">[details]</a></span>
20150122_fifo.log
I've noticed the error message "*ERROR* uncleared fifo underrun on pipe A"
since kernel 3.17, not sure what the best way to reproduce, sometimes it will
appear when changing to tty2 and others when the system is stressed (e.g. high
GPU usage by Chromium).
See attached log, noticed that I only needed to change to tty2 for the error
message appeared.
system: Acer C720, Haswell GT1, 2995U
kernel: 3.19rc5
xf86-video-intel: 2.99.916
mesa: 10.4.2
xorg-server: 1.16.3
distro: Arch Linux x86_64</pre>
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