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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_rotation_crc/cursor-rotation sporadically timeout and causes *ERROR* CPU pipe B FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88859">88859</a>
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<th>Summary</th>
<td>[BSW]igt/kms_rotation_crc/cursor-rotation sporadically timeout and causes *ERROR* CPU pipe B FIFO underrun
</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>All
</td>
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<th>OS</th>
<td>Linux (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
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>huax.lu@intel.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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<pre>Created <span class=""><a href="attachment.cgi?id=112930" name="attach_112930" title="dmesg">attachment 112930</a> <a href="attachment.cgi?id=112930&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
Non-working platforms: BSW
==kernel==
--------------------------
drm-intel-nightly/70438b51bdd44180b83f10591c3bdc1832d11dc2
commit 70438b51bdd44180b83f10591c3bdc1832d11dc2
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Jan 27 12:11:03 2015 +0100
drm-intel-nightly: 2015y-01m-27d-11h-10m-41s UTC integration manifest
==Bug detailed description==
-----------------------------
Run 5 cycles on BSW with the latest -nightly kernel. fail rate: 2/5, it also
has <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BSW]igt/kms_rotation_crc subcases fail"
href="show_bug.cgi?id=86767">bug 86767</a>
It also has following error:
<3>[ 2768.795405] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
IGT-Version: 1.9-g7848d21 (x86_64) (Linux:
3.19.0-rc6_drm-intel-nightly_70438b_20150128+ x86_64)
Subtest cursor-rotation: TIMEOUT (13.084s)
==Reproduce steps==
----------------------------
./kms_rotation_crc --run-subtest cursor-rotation</pre>
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