https://bugs.freedesktop.org/show_bug.cgi?id=75279

Priority: medium Bug ID: 75279 Assignee: dri-devel@lists.freedesktop.org Summary: XCloseDisplay() takes one minute around nouveau_dri.so, freezing Firefox startup Severity: normal Classification: Unclassified OS: Linux (All) Reporter: bjacob@mozilla.com URL: https://bugzilla.mozilla.org/show_bug.cgi?id=973192 Hardware: x86-64 (AMD64) Status: NEW Version: XOrg CVS Component: DRM/other Product: DRI

Hi, I'm just forwarding to you a bug report originally made against Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=973192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)?