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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/drv_missed_irq_hang sporadically causes *ERROR* pipe B underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86189">86189</a>
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<th>Summary</th>
<td>[BSW]igt/drv_missed_irq_hang sporadically causes *ERROR* pipe B 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)
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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
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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>huax.lu@intel.com
</td>
</tr>
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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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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=109327" name="attach_109327" title="dmesg">attachment 109327</a> <a href="attachment.cgi?id=109327&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure, fail rate:1/10
Non-working platforms: BSW
==kernel==
--------------------------
drm-intel-nightly/9a7620f405895714b4e0dc3181a8328b4406287e
==Bug detailed description==
It sporadically causes "<3>[ 673.232605]
[drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe B underrun" on
BSW with -nightly kernel. fail rate: 1/10.
output:
Interrupts masked
Interrupts unmasked
Cleared missed interrupts
==Reproduce steps==
----------------------------
1. ./drv_missed_irq_hang</pre>
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