@Daniel, In regards to issue #17 (of bug #775322) I had a brief discussion with Steve McIntyre [1] who feels that support for grub-legacy should be ditched. Would you be happy with that? If so, I can add a commit to the set of bootloader improvements I am composing under this bug report to implement that. [1] https://lists.debian.org/debian-boot/2015/01/msg00233.html