Meino,
On Tuesday, 2020-04-07 11:32:09 +0200, you wrote:
> ...
> This was created via
> grub-install --efi-directory=/boot/efi
> grub-mkconfig -o /boot/grub/grub.cfg
According to the notes I took when installing Gentoo for the first time
I did:
# echo 'GRUB_PLATFORMS="efi-64"' >> /etc/portage/make.conf
# emerge --ask --verbose sys-boot/grub:2
# grub-install --target=x86_64-efi --efi-directory=/boot
# grub-mkconfig -o /boot/grub/grub.cfg
and on my system there is no directory "/boot/efi/":
# ls -dp /boot/*/* | grep /$
/boot/EFI/gentoo/
/boot/grub/fonts/
/boot/grub/locale/
/boot/grub/themes/
/boot/grub/x86_64-efi/
Not sure whether or not this is relevant for your problem.
Sincerely,
Rainer