Hi, My system is configured to boot UEFI, and I did have a linux distribution which was booting fine. I am not using secure boot and I did disable secure boot while installing opensuse, I think it is not mandatory since it allowed my to disable it. What does not work : the system does not boot on opensuse. After verifying the /boot/efi/EFI/opensuse contains only this file : grubx64.efi that's it. My old linux efi directory contains multiple files : BOOTIA32.CSV, BOOTX64.CSV, gcdia32.efi, gcdx64.efi, grub.cfg, grubia32.efi, grub64.efi shim.efi, shim64.efi So the problem is clear, but I am able to correct it for now. I tried to boot with rescue mode then to chroot the / while mounting all the necessary directories like /dev, /sys, /proc and /run, I also mounted /boot and /boot/efi. Then I tried to reinstall grub2 using : grub2-install --efi-directory=/boot/efi --bootloader-id=opensuse --target=x86_64-efi /dev/nvme0n1 But I am getting this error : grub2-install error efibootmgr failed to register the boot entry : no such file or directory Any ideas? Regards.