<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [ivb] rcs flip hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91601">bug 91601</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;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>DUPLICATE
</td>
</tr>
<tr>
<td style="text-align:right;">Summary</td>
<td>System hangs for ~20 seconds, text becomes garbled
</td>
<td>[ivb] rcs flip hang
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [ivb] rcs flip hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91601#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - [ivb] rcs flip hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91601">bug 91601</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>That kernel is missing a bug fix from circa v3.17 to force mmip flips on IVB
RCS.
commit 2a92d5bca1999b69c78f3c3e97b5484985b094b9
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Tue Jul 8 10:40:29 2014 +0100
drm/i915: Disable RCS flips on Ivybridge
We currently see random GPU hangs when using RCS flips with multiple
pipes on Ivybridge. Now that we have mmio flips, we can fairly cheaply
fallback to using CPU driven flips instead.
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ivb rcs flips 3.14] GPU sporadically hangs during normal desktop usage"
href="show_bug.cgi?id=77104">https://bugs.freedesktop.org/show_bug.cgi?id=77104</a>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
*** This bug has been marked as a duplicate of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ivb rcs flips 3.14] GPU sporadically hangs during normal desktop usage"
href="show_bug.cgi?id=77104">bug 77104</a> ***</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>