<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - kms_frontbuffer_tracking - FBC disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105359">bug 105359</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">i915 platform</td>
<td>
</td>
<td>SKL
</td>
</tr>
<tr>
<td style="text-align:right;">i915 features</td>
<td>
</td>
<td>display/FBC
</td>
</tr>
<tr>
<td style="text-align:right;">Whiteboard</td>
<td>
</td>
<td>ReadyForDev
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - kms_frontbuffer_tracking - FBC disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105359#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - kms_frontbuffer_tracking - FBC disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105359">bug 105359</a>
from <span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span></b>
<pre>I have been running all kms tests on a SKL NUCi5 and noticed that while
connected to both VGA and HDMI ~150 test failed, but when connected to only
HDMI only 2 tests failed. Out of the 1560 failing tests the absolut majority is
kms_frontbuffer_tracking failing with "FBC disabled", see <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [IGT] kms_frontbuffer_tracking@fbc-*draw* has inconsistent results - FBC disabled"
href="show_bug.cgi?id=101623">bug 101623</a>.
However, after reboot I could not reproduce the issue when running FBC related
kms_frontbuffer_tracking tests manually.
While pruning the test list I noticed that I can run the
kms_cursor_legacy tests and get a:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
after that I always hit the "FBC disabled" on the FBC related
kms_frontbuffer_tracking tests.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>