I've also tried setting
[ifupdown] managed=true
in /etc/NetworkManager/NetworkManager.conf
and
`touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf`.
Even this did not fix the problem. (I ran 'netplan generate', 'netplan apply' and rebooted after doing these changes)
I've also tried setting
[ifupdown]
managed=true
in /etc/NetworkMan ager/NetworkMan ager.conf
and
`touch /etc/NetworkMan ager/conf. d/10-globally- managed- devices. conf`.
Even this did not fix the problem. (I ran 'netplan generate', 'netplan apply' and rebooted after doing these changes)