[Bug 75279] XCloseDisplay() takes one minute around nouveau_dri.so, freezing Firefox startup

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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

--- Comment #21 from Benoit Jacob <bjacob-4eJtQOnFJqFBDgjK7y7TUQ@public.gmane.org> ---
 - Are you guys using multi-threaded gl ?

Not here. We could be if Frederic was 1) using non-default preferences such as
layers.acceleration.force-enabled and 2) viewing specific Web pages (e.g. using
WebGL). But here we are talking about a startup hang occurring before this
could kick into play.

Frederic, can you say if you have any force-enabled prefs set in about:config?

 - Considering that the problem is not available with a standalone glxtest app,
do you have a link to a FF build that one can test against ?

Sure. You need a Nightly build, but not a current one since we have landed a
work-around (avoiding to call XCloseDisplay here). This one, from Feb. 20,
should reproduce:

http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2014-02-20-03-02-02-mozilla-central/

E.g.
http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2014-02-20-03-02-02-mozilla-central/firefox-30.0a1.en-US.linux-x86_64.tar.bz2

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