I can confirm this bug.
=============== Locking assertion failure. Backtrace: #0 /usr/lib/libxcb-xlib.so.0 [0xb7d7c767] #1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xb7d7c8b1] #2 /usr/lib/libX11.so.6(_XReply+0xfd) [0xb545929d] #3 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0xb55498ce] #4 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0xb5526067] #5 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0xb5526318] #6 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x2f) [0xb552661f] #7 [0xb5d0becd] #8 [0xb5d04edd] #9 [0xb5d04edd] #10 [0xb5d02249] #11 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/client/libjvm.so [0x621c40d] #12 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/client/libjvm.so [0x6310378] #13 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/client/libjvm.so [0x621c2a0] #14 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/client/libjvm.so(JVM_DoPrivileged+0x363) [0x6272153] #15 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d) [0xb7d1d96d] #16 [0xb5d0becd] #17 [0xb5d04d77] #18 [0xb5d02249] #19 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/client/libjvm.so [0x621c40d] java_vm: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock' failed. Could not read ack from child process Plugin: Java VM process has died. plugin: java process died due to signal 6 a core file was generated Could not start JavaVM!
VM did not start up properly
I can confirm this bug.
=============== libxcb- xlib.so. 0 [0xb7d7c767] libxcb- xlib.so. 0(xcb_xlib_ unlock+ 0x31) [0xb7d7c8b1] libX11. so.6(_XReply+ 0xfd) [0xb545929d] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/xawt/ libmawt. so [0xb55498ce] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/xawt/ libmawt. so [0xb5526067] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/xawt/ libmawt. so [0xb5526318] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/xawt/ libmawt. so(Java_ sun_awt_ X11GraphicsEnvi ronment_ initDisplay+ 0x2f) [0xb552661f] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/client/ libjvm. so [0x621c40d] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/client/ libjvm. so [0x6310378] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/client/ libjvm. so [0x621c2a0] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/client/ libjvm. so(JVM_ DoPrivileged+ 0x363) [0x6272153] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/libjava. so(Java_ java_security_ AccessControlle r_doPrivileged_ _Ljava_ security_ PrivilegedActio n_2+0x3d) [0xb7d1d96d] jvm/java- 6-sun-1. 6.0.04/ jre/lib/ i386/client/ libjvm. so [0x621c40d]
Locking assertion failure. Backtrace:
#0 /usr/lib/
#1 /usr/lib/
#2 /usr/lib/
#3 /usr/lib/
#4 /usr/lib/
#5 /usr/lib/
#6 /usr/lib/
#7 [0xb5d0becd]
#8 [0xb5d04edd]
#9 [0xb5d04edd]
#10 [0xb5d02249]
#11 /usr/lib/
#12 /usr/lib/
#13 /usr/lib/
#14 /usr/lib/
#15 /usr/lib/
#16 [0xb5d0becd]
#17 [0xb5d04d77]
#18 [0xb5d02249]
#19 /usr/lib/
java_vm: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
Could not read ack from child process
Plugin: Java VM process has died.
plugin: java process died due to signal 6
a core file was generated
Could not start JavaVM!
VM did not start up properly