Looks like grub-install got confused by the raid and failed to pass the proper device to efibootmgr.
** Changed in: grub2 (Ubuntu) Importance: Undecided => Low ** Changed in: grub2 (Ubuntu) Status: Invalid => Triaged ** Summary changed: - Feature request: For EFI system grub-install should be able to install to multiple disks + grub-install breaks when ESP is on raid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1466150 Title: grub-install breaks when ESP is on raid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1466150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs