Description of problem: When I try to start java swing applications, it fails with the following error message. java: xcb_xlib.c:52: xcb_xlib_unlock: Assertion `c->xlib.lock' failed. Version-Release number of selected component (if applicable): libX11-1.1.3-4.fc8 http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6532373 Please not that this problem was reported against FC7 as well, and people were able working around by using old version of X11 library. I solved this problem in fedora 7 x86_64; download this: libX11-1.0.3-8.fc7.i386.rpm How reproducible: Fairly easy to reproduce. Steps to Reproduce: 1. Download the sample http://examples.oreilly.com/jswing2/code/ch03/ActionExample.java 2. javac -d . ActionExample.java 3. java ActionExample Actual results: java: xcb_xlib.c:52: xcb_xlib_unlock: Assertion `c->xlib.lock' failed. Expected results: Additional info: Tried with JDK 1.5 and JDK 1.6
*** This bug has been marked as a duplicate of 301691 ***