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List: grub-help
Subject: Re: UEFI: can running grub-install help after a motherboard change?
From: Pascal Hambourg <pascal () plouf ! fr ! eu ! org>
Date: 2022-02-26 20:35:06
Message-ID: b69835a7-4d12-cd4c-6f36-d2ab48c8a6ac () plouf ! fr ! eu ! org
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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.
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