<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - mesa/Glamor with glx-tls enabled is causing GPU to hang on VERDE"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66515#c22">Comment # 22</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - mesa/Glamor with glx-tls enabled is causing GPU to hang on VERDE"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66515">bug 66515</a>
from <span class="vcard"><a class="email" href="mailto:mchehab@infradead.org" title="Mauro Carvalho Chehab <mchehab@infradead.org>"> <span class="fn">Mauro Carvalho Chehab</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=66515#c21">comment #21</a>)
<span class="quote">> I'm a little confused about the symptoms of the problem:
>
> The original report and the attached gdb output show what looks like a
> fairly standard X server crash. When this happens, you should get kicked
> back to console or the display manager login screen.
>
> But the bug title and later comments instead make me think of something like
> a GPU lockup / reset cycle, which sometimes ends with a completely hung
> system.
>
> What is the connection between these two rather different kinds of symptoms?
> Do both of them occur every time? Together, or one after another? ...</span >
When I opened the BZ, the original symptom were a Xorg crash. On a few cases
the machine just hangs (something like 10% of the crashes).
In order to track the root cause and see if this issue was not solved on a
latter fix, I upgraded from kernel 3.9 to kernel 3.10.3 (and later to 3.10.4)
and updated all packages at the machine.
With the updated packages, the symptom changed: when the GPU stops to answer to
mesa/Glamor, instead of causing Xorg to crash (and when the machine doesn't
hang) it now reports:
[15225.379837] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
As shown on this attachment:
<a href="https://bugs.freedesktop.org/attachment.cgi?id=83300">https://bugs.freedesktop.org/attachment.cgi?id=83300</a>
The workaround to avoid the buggy code was to disable glx-tls at Mesa.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>