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<body><span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTOURBUG - totem crashed with SIGTRAP in __glXSendError() from MakeContextCurrent()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110452">bug 110452</a>
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<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>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>NOTOURBUG
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTOURBUG - totem crashed with SIGTRAP in __glXSendError() from MakeContextCurrent()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110452#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTOURBUG - totem crashed with SIGTRAP in __glXSendError() from MakeContextCurrent()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110452">bug 110452</a>
from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span></b>
<pre>Backtrace goes through:
totem -> clutter-gst (frame update) -> cogl (pipeline free) -> gstreamer
(buffer free) -> gstreamer-vaapi (destroy objects) -> Nvidia libglvd
(CommonMakeCurrent / InternalMakeCurrentVendor) -> Mesa GLX
(MakeContextCurrent) -> Xlib (XError)
Ubuntu bug doesn't say anything about what's the use-case / when this happens
and whether it's reproducible (is it e.g. timing related), it seems just some
random crash that Apport collects.
In the backtrace Mesa MakeContextCurrent() calls __glXSendError() to tell that
it was given invalid/bad context. Corresponding Mesa code:
---------------------------
if (gc) {
/* Attempt to bind the context. We do this before mucking with
* gc and __glXSetCurrentContext to properly handle our state in
* case of an error.
*
* If an error occurs, set the Null context since we've already
* blown away our old context. The caller is responsible for
* figuring out how to handle setting a valid context.
*/
if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
__glXSetCurrentContextNull();
__glXUnlock();
__glXSendError(dpy, GLXBadContext, None, X_GLXMakeContextCurrent,
False);
return GL_FALSE;
}
---------------------------
I.e. bug is in what is given to Mesa, not what Mesa does.
-> NOTOURBUG
To me it looks something that could happen when Totem is exiting, gst-vaapi is
trying to use resources that have already been freed, and X catching that when
Gstreamer gstvaapitexture_glx.c::destroy_objects() ask libglvnd to do
CommonMakeCurrent().</pre>
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