Comment 7 for bug 85513

Same issue occurring for me, vlc crashes when trying to play any video when opengl is selected as video output. Terminal output is:

[00000338] a52 decoder: A/52 channels:6 samplerate:48000 bitrate:640000
No accelerated IMDCT transform found
[00000342] main private error: option glx-shm does not exist
X Error of failed request: GLXBadDrawable
  Major opcode of failed request: 143 (GLX)
  Minor opcode of failed request: 26 ()
  Serial number of failed request: 65
  Current serial number in output stream: 65
Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb4838767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb483881e]
#2 /usr/lib/libX11.so.6 [0xb4a145f8]
#3 /usr/lib/libX11.so.6(XESetCloseDisplay+0x31) [0xb49f79b1]
#4 /usr/lib/libGL.so.1 [0xaf3d9b69]
vlc: xcb_xlib.c:73: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Aborted (core dumped)

Tested in Hardy (current as of report), vlc 0.8.6.release.d-0ubuntu3, with Nvidia 8600GT, nvidia-glx-new-169.09+2.6.24.9-8.25. Let me know if any more info is needed.