GRUB version 2.02~beta2-9 also have the same issue. When you insert the U-disk, it can't assure the hd0 is hard disk, sometimes it's U-disk, and this is the root cause of this issue.
** Also affects: grub Importance: Undecided Status: New ** Also affects: oem-priority Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311552 Title: System always entering image media after finish the recovery without the installer media unplugged. To manage notifications about this bug go to: https://bugs.launchpad.net/grub/+bug/1311552/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs