Hello Raul,

RAUL H C LOPES <rlopes@cern.ch> writes:

> Hi,
>
>
> I've emailed a few hours ago about an error in the GUIXSD installer. It 
> might be relevant that I was doing encrypted home and root. Very likely 
> unconnected.
>
>
> I've just tried a new install without encryption. A new failure:
>
>    .../grub-install- error: efibootmgr failed to register the boot 
> entry: Input/output error.

This means that GRUB failed to update the UEFI variables on your system.
Are you using the generated configuration file or a custom one?

The most likely reason for this error is that you are using
'grub-efi-bootloader' on a non-EFI system.  Changing to
'grub-bootloader' should solve it in that case.

HTH,
Marius