Hi, I'm just forwarding to you a bug report originally made against Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=973192
The symptom is Firefox freezing on startup. The cause (see around comment
39--42 on that bug) is that a XCloseDisplay() call takes about one minute to
return.
The original reporter of the bug has recorded a profile which shows time spent
in nouveau_dri.so (see comments 50, 51 on the mozilla bug)
If you want to see what the application code triggering this bug looks like,
it's all self-contained in this file:
http://hg.mozilla.org/mozilla-central/file/tip/toolkit/xre/glxtest.cpp
228 glXMakeCurrent(dpy, None, nullptr);
229 glXDestroyContext(dpy, context);
230 XDestroyWindow(dpy, window);
231 XFreeColormap(dpy, swa.colormap);
232 XCloseDisplay(dpy); // <--- this XCloseDisplay call takes 1 minute
233 dlclose(libgl);
Is there some more information that you need, that isn't already on the mozilla
bug?
Is this application code doing something evil here?
Is this a known issue? Do you have a guess as to whether it might affect many
users (i.e., should we try working around it)?