[10:32] <enyc> Interested, in how to add uefi boot capability to a system upgraded from  20.04 to 22.04 ...  now have a /boot/efi partition of type 0xEF  .
[10:32] <enyc> installed grub-efi-amd64-bin and grub-efi-amd64-signed ... grub-install /dev/sda  doesn't help ;o
[10:33] <enyc> just not sure how that was actually "done", if you like.
[10:33] <enyc> I thought, new 22.04 installs now always support both legacy and uefi booting ,and use GPT regardless on new disk partitioning.