I suspect this is no longer an issue on Hardy, but if it is feel free to reopen with more details if it does. Make sure to include your /var/log/Xorg.0.log. It may also be worthwhile to collect a backtrace (see http://wiki.ubuntu.com/X/Backtracing for directions).
** Changed in: xorg (Ubuntu) Status: New => Invalid -- When switching between compositing and non compositing window manager, X freezes https://bugs.launchpad.net/bugs/133195 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs