Re: UEFI: can running grub-install help after a motherboard change?

[Pascal Hambourg]

Le 26/02/2022 à 11:48, Sébastien Hinderer a écrit :
> The other thing that happened is that when I ran grub-install it
> reported that the system does not support BIOS variables.

Do you mean EFI variables ? Either the system booted in legacy mode, or 
efivarfs is not mounted.

> This scared me
> a little but now things seem to work OK, perhaps because the bootloader
> is seen as a removable device?

Which options did you use when running grub-install ? Without any 
options it does not install in the removable media path and it requires 
EFI variables.

> Here is the output of efibootmgr:
>
> BootCurrent: 0002
> Timeout: 0 seconds
> BootOrder: 0002,0001,0004,0003,0005,0006
> Boot0001  Diskette Drive
> Boot0002* debian
(...)

There is a "debian" boot entry, first in boot order, and used by the 
current boot. It looks as it should.

> It feels to me some cleanup would be in order

No, other boot entries are not related with boot loader installations 
but with available boot devices.

> Is there a safe way to determine whether the BIOS varialbes are actually
> available / enabled?

If efibootmgr did not complain, then EFI variables are available.

Thanks for the feedback, always appreciated.