I was tested Ubuntu 11.04 release and found xorg stable, not crashing anymore! xorg 1:7.6+4ubuntu3 works good, closing bug as fixed.
** Changed in: xorg-server (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/714430 Title: Xorg crash on deactivate external display while internal switched off -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs