Nouveau - Mar 2014 - [Bug 75279] XCloseDisplay() takes one minute around nouveau_dri.so, freezing Firefox startup

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

--- Comment #26 from Frederic Bezies <fredbezies at gmail.com> ---
(In reply to comment #24)
[...]
> 
> Seems to be stuck at the same spot with identical call stack, minus the
> state tracker bits.
> 
> The memory access message looks interesting, shame there is no indication
of
> what nouveau was doing to provoke this. (gdb) bt full, info locals or
> disassemble should be able to catch what is going on here.
> 
> How often do you get this ? Please attach the gdb output of the above three
> as the problem occurs.
It happens when I try to connect to my youtube account. And after 30 seconds or
so, plugin-container works as expected.

Here is bt full log :

(gdb) bt full
#0  0x00007fb478a49337 in sched_yield () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007fb46670ee41 in ?? () from /usr/lib/vdpau/libvdpau_nouveau.so.1
No symbol table info available.
#2  0x00007fb46679eca5 in ?? () from /usr/lib/vdpau/libvdpau_nouveau.so.1
No symbol table info available.
#3  0x00007fb4666019c1 in vl_screen_destroy ()
   from /usr/lib/vdpau/libvdpau_nouveau.so.1
No symbol table info available.
#4  0x00007fb4667073a1 in vlVdpDeviceDestroy ()
   from /usr/lib/vdpau/libvdpau_nouveau.so.1
No symbol table info available.
#5  0x00007fb46b4252a8 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#6  0x00007fb46b0871b5 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#7  0x00007fb46b088000 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#8  0x00007fb46b6167c8 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#9  0x00007fb46b61cf7d in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#10 0x00007fb46b61ea6b in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
Cannot access memory at address 0x7fffc4f85b78

Some technical infos : nouveau 1.0.10, mesa 10.0.3

All this on an archlinux 64 bits, up-to-date.

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