Ok, so your machine is booted from EFI but has both the PC and EFI version of grub installed, that's the problem.
Try removing grub-pc and grub-pc-bin from your system, then install shim-signed again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1250611 Title: shim-signed update unrecognized option To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1250611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
