BTW, I had tested that plymouth prompting for non-root devices works here; but I only tested with a LUKS device and it was on a system that also had root on LUKS, so perhaps one of these variables masked the problem.
BTW, I had tested that plymouth prompting for non-root devices works here; but I only tested with a LUKS device and it was on a system that also had root on LUKS, so perhaps one of these variables masked the problem.