Can you run the following commands and provide their output: sudo mdadm -D /dev/md127 sudo grub-probe -t fs -d /dev/md127 -vvv
** Package changed: ubiquity (Ubuntu) => grub2 (Ubuntu) ** Changed in: grub2 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1366575 Title: trusty 14.01 efi installer crashes on grub install failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1366575/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs