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[Daniel van Vugt <966814@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

(gdb) bt
#0  0x00007f8326185b03 in __GI___poll (fds=<optimised out>, nfds=<optimised out>, timeout=<optimised out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8324091862 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8324092fff in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8325b8bce8 in _XReadEvents () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#4  0x00007f8325b8a27d in XWindowEvent () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007f83269b253c in PrivateScreen::initDisplay (this=0x11d0ab0, name=<optimised out>) at /tmp/buildd/compiz-0.9.7.2/src/screen.cpp:4790
#6  0x00007f83269afb2d in compiz::private_screen::EventManager::init (this=0x11d0ab0, name=0x0) at /tmp/buildd/compiz-0.9.7.2/src/screen.cpp:4596
#7  0x000000000040356c in CompManager::init (this=0x7fffe5c24990) at /tmp/buildd/compiz-0.9.7.2/src/main.cpp:169
#8  0x0000000000402989 in main (argc=<optimised out>, argv=0x7fffe5c24ac8) at /tmp/buildd/compiz-0.9.7.2/src/main.cpp:234

The hang happens on compiz restart after an earlier instance has crashed
or exited.

** Affects: compiz-core
     Importance: High
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: compiz-core
   Importance: Undecided
       Status: New

** Changed in: compiz-core
       Status: New => In Progress

** Changed in: compiz-core
     Assignee: (unassigned) => Daniel van Vugt (vanvugt)

** Changed in: compiz-core
   Importance: Undecided => High

** Description changed:

  (gdb) bt
  #0  0x00007f8326185b03 in __GI___poll (fds=<optimised out>, nfds=<optimised out>, timeout=<optimised out>) at ../sysdeps/unix/sysv/linux/poll.c:87
  #1  0x00007f8324091862 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
  #2  0x00007f8324092fff in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
  #3  0x00007f8325b8bce8 in _XReadEvents () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  #4  0x00007f8325b8a27d in XWindowEvent () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  #5  0x00007f83269b253c in PrivateScreen::initDisplay (this=0x11d0ab0, name=<optimised out>) at /tmp/buildd/compiz-0.9.7.2/src/screen.cpp:4790
  #6  0x00007f83269afb2d in compiz::private_screen::EventManager::init (this=0x11d0ab0, name=0x0) at /tmp/buildd/compiz-0.9.7.2/src/screen.cpp:4596
  #7  0x000000000040356c in CompManager::init (this=0x7fffe5c24990) at /tmp/buildd/compiz-0.9.7.2/src/main.cpp:169
  #8  0x0000000000402989 in main (argc=<optimised out>, argv=0x7fffe5c24ac8) at /tmp/buildd/compiz-0.9.7.2/src/main.cpp:234
+ 
+ The hang happens on compiz restart after an earlier instance has crashed
+ or exited.

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https://bugs.launchpad.net/bugs/966814

Title:
  compiz hangs on startup in XWindowEvent() from
  PrivateScreen::initDisplay()

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