How to switch from systemd-boot to grub2-efi

English Install/Boot/Login
1

on my laptop I just installed opensuse slowroll running KDE plasma.
I found that I have systemd-boot.
I would like to switch to grub2-efi, I googled and found this:

Install GRUB2
Update Bootloader Configuration
Change the loader type variable in /etc/sysconfig/bootloader
LOADER_TYPE=“systemd-boot” and change it to
LOADER_TYPE=“grub2-efi”
Reinitialize and Install GRUB
install GRUB to your EFI partition
sudo update-bootloader --install --config

I installed grub via myrlyn
in /etc/sysconfig/bootloader I changed
LOADER_TYPE=“systemd-boot”
LOADER_TYPE=“grub2-efi”

but with sudo update-bootloader --install I had this error:

pla@localhost:~> sudo update-bootloader --install
[sudo] password for pla:
target = x86_64-efi, update default location = 0
+ /usr/sbin/shim-install --config-file=/boot/grub2/grub.cfg
No valid EFI partition
efi_distro_dir=opensuse
efi_order=0000,0003,0005,0004,0002,0001,2001,2002,2003
efi_entry.num=0003
efi_entry.file=EFI/opensuse/shim.efi
efi_entry.name=opensuse-secureboot
pla@localhost:~>

how can I proceed to have grub2-efi bootloader?

2

Since you just installed slowroll, the easiest solution would be to do a new install and select “grub2-efi” in the booting section during install.

I’m not sure why you tagged this as “leap-16” when it is about slowroll.

4

I would also like to know as I have done a test TW install and got systemd-boot. It works but for alingment with other Linuxes I rather want GRUB.
I would say, if grub2 is getting installed, it should remove systemd-boot and also do all this config for you. But apparently not.
I once had to fix it on 1 computer, not sure why things went wrong at an update, but there is:
grub2
grub2-efi
grub2-bls