[deleted] thanks for that. my experiences with efibootmgr are varied. most of the time I could make the boot order stick. but NONE of the time would any of my boot deletions stick after a reboot. they would mysteriously reappear. I carried out all the commands with escalated privileges, the right way.
that got me thinking do I actually have to go into /efi/boot folders and manually pilfer and plunder files to make this work? maybe I was doing something wrong. it's worth another look.
I feel like L for Loser having one operating system with two boot methods....
