See bug #1762988 for a discussion of how (a) this also affects Ubuntu installers and (b) a non secureboot full disk encryption installation can be achieved with the alternative server installer (AKA debian-installer).
See bug #1762988 for a discussion of how
(a) this also affects Ubuntu installers and
(b) a non secureboot full disk encryption installation can be achieved with the alternative server installer (AKA debian-installer).