Thanks. Since this fails for you both with efibootmgr and with grub, that suggests there might be a bug in the underlying efivar library. Opening a task on that package.
Can you try installing the libefiboot1 and libefivar1 packages from https://launchpad.net/ubuntu/+source/efivar/34-1/+build/14347977 and running the efibootmgr command again, to see if that changes the behavior for you?
Thanks. Since this fails for you both with efibootmgr and with grub, that suggests there might be a bug in the underlying efivar library. Opening a task on that package.
Can you try installing the libefiboot1 and libefivar1 packages from https:/ /launchpad. net/ubuntu/ +source/ efivar/ 34-1/+build/ 14347977 and running the efibootmgr command again, to see if that changes the behavior for you?