Please have /boot on a separate partition which is ext4 and not f2fs. That way you can have / as f2fs.
also insmod is disabled when secureboot is on. ** Changed in: grub2 (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1868664 Title: grub 2.04 can't read f2fs volume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1868664/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs