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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=101868">101868</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>
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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
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<th>Reporter</th>
<td>sven.koehler@gmail.com
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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
</td>
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<pre>On my Dell XPS 9560 with an Intel Core i7 7700HQ, the display is flickering
occasionally. When the flickering occurs, the following message appears in
dmesg:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
If I work on Windows (which I rarely do), the flickering is absent. When I work
with Linux, it appears a few times a day.
I believe I have the most current DMC firmware installed:
[drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin (v1.1)
The flickering seems to happen especially often, if the laptop is running on
battery.
I am using enable_rc6=0 right now, and it seems the problem with the FIFO
underrun disappeared. No more display flickering.</pre>
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