I have the exact same problem. I've tried from the update manager and from the alternate CD (burned from the iso). It just locks after a few seconds while in the first stage.
** Attachment added: "what i see when performing the upgrade" http://launchpadlibrarian.net/13976544/installation-bug.png -- upgrade 7.10 to 8.04beta freeze https://bugs.launchpad.net/bugs/209609 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