Comment 11 for bug 71030

I'm having the same problem with opening any opengl application. My setup is two nvidia cards with 3 monitors in xinerama using the nvidia binary drivers.

sam@rambo:~$ glxgears
X Error of failed request: BadMatch (invalid parameter attributes)
  Major opcode of failed request: 78 (X_CreateColormap)
  Serial number of failed request: 12
  Current serial number in output stream: 18
Locking assertion failure. Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb73b2767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb73b281e]
#2 /usr/lib/libX11.so.6 [0xb7cb3518]
#3 /usr/lib/libX11.so.6(XESetCloseDisplay+0x31) [0xb7c968d1]
#4 /usr/lib/libGL.so.1 [0xb7ee64d5]
#5 /lib/tls/i686/cmov/libc.so.6(exit+0xd4) [0xb7d89084]
#6 /usr/lib/libX11.so.6 [0xb7cac63e]
#7 /usr/lib/libX11.so.6(_XError+0xfe) [0xb7cac73e]
#8 /usr/lib/libX11.so.6 [0xb7cb3e5c]
#9 /usr/lib/libX11.so.6(_XReply+0x15a) [0xb7cb421a]
#10 /usr/lib/libX11.so.6(XQueryExtension+0xaa) [0xb7ca206a]
#11 /usr/lib/libX11.so.6(XInitExtension+0x3b) [0xb7c96d4b]
#12 /usr/lib/libXext.so.6(XextAddDisplay+0x53) [0xb73c4443]
#13 /usr/lib/libGL.so.1 [0xb7f06474]