If you have removed ubuntu-desktop, your system is a custom install, and unfortunately, you need to install libu2f-udev yourself....
Have you tried installing ubuntu-desktop _without recommends_ ? it should be a very minimal install, without any additional installs in bionic onwords. $ sudo apt install ubuntu-desktop --no-install-recommends -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1752202 Title: U2F not working after upgrade: systemd dropped udev rules and libu2f- udev not installed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-meta/+bug/1752202/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
