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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90896">90896</a>
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<th>Summary</th>
<td>[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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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
</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>fraph24@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>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=116363" name="attach_116363" title="journalctl -k -t kernel > intel_cpu_fifo_underrun_irq_handler-kernel.txt">attachment 116363</a> <a href="attachment.cgi?id=116363&action=edit" title="journalctl -k -t kernel > intel_cpu_fifo_underrun_irq_handler-kernel.txt">[details]</a></span>
journalctl -k -t kernel > intel_cpu_fifo_underrun_irq_handler-kernel.txt
It happens when switching back from VT to X after a couple of seconds of
flickering.
It was found while investigating on:
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Heavy black flickering with Intel graphics after VT switching to Mir from X"
href="show_bug.cgi?id=88944">https://bugs.freedesktop.org/show_bug.cgi?id=88944</a>
$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.0.4-303.fc22.x86_64
root=UUID=6d95a3dd-0830-4bf9-94c1-a37232327df9 ro rootflags=subvol=root
rd.luks.uuid=luks-81064417-7468-43b9-8e39-2e5e9e332d40
rd.luks.uuid=luks-87e2654d-afaa-402c-a4a7-1d6aa1e2403b rhgb quiet
systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M drm.debug=0xe
$ uname -a
Linux winston 4.0.4-303.fc22.x86_64 #1 SMP Thu May 28 12:37:06 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux
$ cat /etc/system-release
Fedora release 22 (Twenty Two)</pre>
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