Comment 26 for bug 1676547

I just had the same problem...

I installed Ubuntu server 17.10 on a freshly formatted disk. During the install I was asked to configure the wired interface. Ok

After that I installed the meta-package ubuntu-desktop and re-booted. No wired interface available in NetworkManager. Wireless is ok.

I had to change "/etc/netplan/01-netcfg.yaml" from:

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
  version: 2
  renderer: networkd
      dhcp4: yes


# Let NetworkManager manage all devices on this system
  version: 2
  renderer: NetworkManager

All is well after a reboot.