Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb5c2b767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb5c2b8b1]
#2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb5efa29d]
#3 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/motif21/libmawt.so [0xa191276e]
#4 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/motif21/libmawt.so [0xa18b86e6]
#5 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/motif21/libmawt.so [0xa18b892d]
#6 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/motif21/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x24) [0xa18b8b38]
#7 [0xae52ab8b]
#8 [0xae524a7b]
#9 [0xae524a7b]
#10 [0xae522157]
#11 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/client/libjvm.so [0xb31758ec]
#12 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/client/libjvm.so [0xb3264378]
#13 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/client/libjvm.so [0xb317571f]
#14 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x2db) [0xb31cdebb]
#15 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d) [0xb37682cd]
#16 [0xae52a43b]
#17 [0xae5249a4]
#18 [0xae522157]
#19 /opt/matlab/sys/java/jre/glnx86/jre1.5.0/lib/i386/client/libjvm.so [0xb31758ec]
MATLAB: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
Aborted (core dumped)