Same problem here with Ubuntu 9.04 x64 beta. When I press alt-ctrl-del the system responds with a message: failed to shutdown md devices. After that it restarts. Sometimes I see this:
Killing all remining processes... [fail] Unmounting local filesystems... mount: / is busy. Sony VAIO SR290 notebook -- failed to stop md devices on jaunty restart or shutdown https://bugs.launchpad.net/bugs/350207 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