I have also experienced this bug. I just upgraded my 8.10 system to 9.04 using update-manager. Everything went fine until reboot, after which the system got stuck while loading grub, and gave me the "Error 15" message.
I would very much appreciate a suggestion on how to recover from this - thanks. -- Upgrade 8.10 to 9.04 Grub Error 15 on reboot https://bugs.launchpad.net/bugs/366556 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