I had an issue booting with kernel 2.6.31-20 that got solved when upgrading to *-21. Can you try to press SHIFT when you start the machine so that it shows the Grub menu, select an older kernel to boot (like *-19) and do a dist-upgrade to install the latest kernel?
** Package changed: ubuntu => linux (Ubuntu) -- Lucid won't boot https://bugs.launchpad.net/bugs/567005 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
