The fix worked for me (on an Asus B650E-E mainboard), after enabling proposed updates I updated the packages using
sudo apt install -t oracular-proposed grub-common grub-efi-amd64-bin grub-efi-amd64-signed grub-efi-amd64-unsigned grub2-common -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2084104 Title: UEFI GRUB2 enforces NX even with a non-NX shim To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2084104/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs