Working with ubuntu 20.04, upgraded from 18.04 some time ago.
I need to be connected to my companys vpn, so I installed nm-connection-manager and configured my "Wired Connection 1" to always connect to vpn when connected and to automatically connect to "Wired Connection 1" if available. I also noticed a wired connection called "netplan-enp0s34f6", with IPv6 disabled. I deleted this connection.
On the next reboot, the wired "netplan" connection was back, with a slightly different name "netplan-enp0s98d3" or similar, and connected by default.
So I thought: "ok, I use that connection then", configured it to connect automatically to vpn and thought nothing bad.
The next day I booted up my laptop and the "old" "netplan-enp0s98d3" connection was away and a new "netplan-XXX" connection in place, rendering all my "auto vpn connection"-configuration useless.
What is going on? How can I use my "Wired Connection 1" with IPv6 and auto vpn connection all the time?
Why is Gnome creating and dropping network connctions on every boot? Why are they called "netplan-*" ?
How can I disable this behaviour?
Any help appreciated.