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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #19 from Benoit Jacob <bjacob at mozilla.com> ---
A duplicate Mozilla bug has a stack with symbols:

https://bugzilla.mozilla.org/show_bug.cgi?id=975512#c1

#0  0x0000003f3a2da007 in sched_yield () from /lib64/libc.so.6
#1  0x00007f1e003bb1d1 in nouveau_fence_wait ()
   from /usr/lib64/dri/nouveau_dri.so
#2  0x00007f1e0039d635 in nvc0_screen_destroy ()
   from /usr/lib64/dri/nouveau_dri.so
#3  0x00007f1e002c6d9f in dri_destroy_screen_helper ()
   from /usr/lib64/dri/nouveau_dri.so
#4  0x00007f1e002c6e25 in dri_destroy_screen ()
   from /usr/lib64/dri/nouveau_dri.so
#5  0x00007f1e000087eb in driDestroyScreen ()
   from /usr/lib64/dri/nouveau_dri.so
#6  0x000000321f646932 in dri2DestroyScreen () from /lib64/libGL.so.1
#7  0x000000321f61c526 in FreeScreenConfigs.isra.3 () from /lib64/libGL.so.1
#8  0x000000321f61c5a5 in glx_display_free () from /lib64/libGL.so.1
#9  0x000000321f61c6a5 in __glXCloseDisplay () from /lib64/libGL.so.1
#10 0x0000003f3e21fd22 in XCloseDisplay () from /lib64/libX11.so.6
#11 0x00007f1e09933dcf in glxtest() () from /home/sstangl/bin/nightly/libxul.so
#12 0x00007f1e09934b36 in fire_glxtest_process() ()
   from /home/sstangl/bin/nightly/libxul.so
#13 0x00007f1e0992e655 in XREMain::XRE_mainInit(bool*) ()
   from /home/sstangl/bin/nightly/libxul.so
#14 0x00007f1e09932886 in XREMain::XRE_main(int, char**, nsXREAppData const*)
    () from /home/sstangl/bin/nightly/libxul.so
---Type <return> to continue, or q <return> to quit---
#15 0x00007f1e09932b94 in XRE_main () from /home/sstangl/bin/nightly/libxul.so
#16 0x0000000000406b66 in do_main(int, char**, nsIFile*) ()
#17 0x000000000040383b in main ()

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