Le 22/02/2022 à 20:54, Sébastien Hinderer a écrit :
Given that running grub-install had already been done with my former
motherboard, does it make sense to run it again with the new
motherboard? Does grub-install somehow interact with the motherboard to
let it know it supports UEFI mode?
Yes and yes. The normal way of booting in UEFI mode requires to
"register" the boot loader in the EFI boot variables which are stored in
the motherboard non volatile memory. EFI boot variables can be read and
written with efibootmgr.
A way to not depend on EFI boot variables is to install the boot loader
in the "removable media path". You can do it with
grub-install --removable
In Debian, you can use
grub-install --force-extra-removable
to install GRUB in both the normal location (and update EFI variables)
and the removable media path.
