I have installed Ubuntu 18.04.2 server and then installed ubuntu-unity-desktop, and Network Manager is hosed. This problem has been reported more than once (Ethernet device not managed) and I am sure this question will be marked as a duplicate, but I have tried all the remedies and the problem has not been resolved.
I have tried:
- an empty
What finally fixed it was editing /etc/netplan/*.yaml
@heynnema - Why was it the wrong thing to do? It seems to have worked. My /etc/interfaces files is nothing but comments. My netplan yaml is what I finally edited, and is:
network: version: 2 renderer: NetworkManager
lshw reports correctly ehat my only network interface is a RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller