I confirmed that the /etc/resolv.conf and network-manager can work by removing the two lines of /etc/network/interfaces:
auto eth0 iface eth0 inet manual
The /etc/resolv.conf will be re-synced by NM although it seems to be managed by systemd-resolved.
I confirmed that the /etc/resolv.conf and network-manager can work by removing the two lines of /etc/network/ interfaces:
auto eth0
iface eth0 inet manual
The /etc/resolv.conf will be re-synced by NM although it seems to be managed by systemd-resolved.