I have also attempted to verify xenial (using version 1.66.27+2.02_beta2-36ubuntu3.27), however grub-efi-amd64-signed_1.66.27+2.02_beta2-36ubuntu3.27 still seems to be unavailable in -proposed (http://archive.ubuntu.com).
I have manually downloaded it and tested from here [1], however I'll postpone the verification until it's available.
I have also attempted to verify xenial (using version 1.66.27+ 2.02_beta2- 36ubuntu3. 27), however grub-efi- amd64-signed_ 1.66.27+ 2.02_beta2- 36ubuntu3. 27 still seems to be unavailable in -proposed (http:// archive. ubuntu. com).
I have manually downloaded it and tested from here [1], however I'll postpone the verification until it's available.
[1] https:/ /launchpad. net/ubuntu/ +archive/ primary/ +files/ grub-efi- amd64-signed_ 1.66.27+ 2.02~beta2- 36ubuntu3. 27_amd64. deb