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 #28 from Frederic Bezies <fredbezies at gmail.com> ---
Some progress with debug packages. But I think I'll need xf86-video-nouveau
debug package too.

At least, here is the log :

(gdb) bt full
#0  0x00007f364503a337 in sched_yield () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007f3632d0e411 in nouveau_fence_wait (fence=0x7f3630760550)
    at nouveau_fence.c:212
        screen = 0x7f3639e76c00
        spins = 329500464
#2  0x00007f3632d9e115 in nv50_screen_destroy (pscreen=0x7f3639e76c00)
    at nv50/nv50_screen.c:286
No locals.
#3  0x00007f3632c019c1 in vl_screen_destroy (vscreen=0x7f3639e5c980)
    at ../../../../src/gallium/auxiliary/vl/vl_winsys_dri.c:414
        scrn = 0x7f3639e5c980
#4  0x00007f3632d069c1 in vlVdpDeviceDestroy (device=1) at device.c:174
        dev = 0x7f3639eaf2d0
#5  0x00007f3637a252a8 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#6  0x00007f36376871b5 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#7  0x00007f3637688000 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#8  0x00007f3637c167c8 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#9  0x00007f3637c1cf7d in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#10 0x00007f3637c1ea6b in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#11 0x00007f3637c1ed8a in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#12 0x00007f3637880601 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#13 0x00007f36379e5d31 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#14 0x00007f36379e60b5 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#15 0x00007f36379e4efd in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#16 0x00007f36379edae2 in ?? () from /usr/lib/mozilla/plugins/libflashplayer.so
No symbol table info available.
#17 0x00007f364751c347 in ?? () from /home/fred/Applications/firefox/libxul.so
No symbol table info available.
#18 0x00007f3646d94720 in ?? () from /home/fred/Applications/firefox/libxul.so
No symbol table info available.
#19 0x00007f3646d955bd in ?? () from /home/fred/Applications/firefox/libxul.so
No symbol table info available.
#20 0x00007f3646caff3c in ?? () from /home/fred/Applications/firefox/libxul.so
No symbol table info available.
#21 0x00007f3646cb12da in ?? () from /home/fred/Applications/firefox/libxul.so
No symbol table info available.
Cannot access memory at address 0x7fff90a93308

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