After using grub-customizer, how do I recover the ZFS Grub2 menu options on Ubuntu 20.04?
Solution 1:
I got it fixed by doing the following
- purging grub-customizer.
- restoring a backup of the grub configuration files from
/etc/grub.d/backup/, where grub-customizer put it. - Running
grub-mkconfig -o /boot/efi/EFI/ubuntu/grub.cfgto regenerate grub - reinstalling zsys and the grub2 efi x64 package.
After this, everything is back to normal.