<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - xorg-server 1.18.2 freeze desktop on i915"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94515#c35">Comment # 35</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - xorg-server 1.18.2 freeze desktop on i915"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94515">bug 94515</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>It looks like the Client sent PresentPixmap with a divisor=1<<32, or even
target_msc of 1<<32.
I think
commit f656f6afa288c63968f45d6d32c96a4cf6213117
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Tue Mar 22 22:11:18 2016 +0000
sna/present: Report BadValue if target_msc exceeds last known msc by 1<<32
As we cannot queue a vblank further than 1<<32 into the future, nor can
we set a Timer to expire that far into the future, creating such a
vblank event is futile. Report BadValue and hope for the best.
References: <a class="bz_bug_link
bz_status_NEW "
title="NEW - xorg-server 1.18.2 freeze desktop on i915"
href="show_bug.cgi?id=94515">https://bugs.freedesktop.org/show_bug.cgi?id=94515</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
should hide the immediate issue with the freeze / busy spin.
Can someone attach gdb and put a breakpoint on present_pixmap() line 953, just
after present_queue_vblank() returns an error and print the locals? I am most
interested in getting the arguments to the function so we can compare what the
client requested with the computed vblank.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>