Same happens here with Ubuntu 9.04 (standard, not in VirtualBox) It occurs each time in fullscreen when menus disappear.
2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 19:49:51 UTC 2009 i686 GNU/Linux GeForce Go 7400 NVIDIA UNIX x86 Kernel Module 173.14.16 Sat Jan 24 19:42:59 PST 2009 -- Video freezes at pass in a full-screen mode https://bugs.launchpad.net/bugs/379799 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