Comment 4 for bug 1828273

Yet another comment I found said that the following would work, but it did not:
systemctl set-default -f multi-user.target

Take into account that this is Ubuntu Server 18.04. Server operating system should not rely on graphics cards, so it should be possible to boot Ubuntu Server without a framebuffer.

Is there a systemd service which I can blacklist to avoid the framebuffer being created?