Comment 55 for bug 185311

Same here on xubuntu.

szemy@szemy-desktop:~$ glxinfo
name of display: :0.0
Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb7705767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb77058b1]
#2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb78911bd]
#3 /usr/lib/libGL.so.1 [0xb7d5e22b]
#4 /usr/lib/libGL.so.1 [0xb7d5d87a]
Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb7705767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb770581e]
#2 /usr/lib/libX11.so.6 [0xb7890518]
#3 /usr/lib/libX11.so.6(XGetVisualInfo+0x26) [0xb78870a6]
#4 /usr/lib/libGL.so.1 [0xb7d5ddb1]
glxinfo: ../../src/xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed.
Aborted