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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [snb i915] DP Flicker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73943">73943</a>
</td>
</tr>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>[snb i915] DP Flicker
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>crshman@gmail.com
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
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<pre>Hello,
I'm currently experiencing an issue where my two display port driven screens
flicker randomly. At first I thought this was a kernel driver issue but as the
kernel modules have progress I'm thinking less so.
I'm currently working through a FIFI underrun here:
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [snb dp hotplug] Pipe B, PCH transcoder B FIFO underrun"
href="show_bug.cgi?id=70254">https://bugs.freedesktop.org/show_bug.cgi?id=70254</a>
However I've noticed that my screen blanks no longer accurately correlate with
the "[drm:ilk_display_irq_handler], Pipe X FIFO underrun" logs that are being
spit out.
I can have many screen flickers but nothing is output in the logs, which leads
be to believe the error is somewhere higher in the stack.
My hardware is a lenovo X220 with a sandybridge era i7.
# uname -a
Linux rnavarro-thinkpad 3.13.0-994-generic #201401210405 SMP Tue Jan 21
09:05:52 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
I'm currently running on ubuntu 13.10 with the latest 3.13 mainline kernel and
packages from the xorg-edgers PPA which includes xserver-xorg-video-intel at
"2:2.99.907+git20140117.f23ab963-0ubuntu0sarvatt~saucy"
I'm attaching a few logs, but any assistance in helping me track down this
flicker would be great!
Let me know what other information is required.</pre>
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