Ubuntu installs pppoeconf after conflict with NetworkManager

After dialing using pppoeconf, Network Manager displays the solution that the device is not managed:

Configure the network connection management file by entering the following command in the terminal:

After Sudo gedit/etc/networkmanager/nm-system-settings.conf is opened, find [Ifupdown] Managed=false modified to: [Ifupdown] Managed=true

Terminal Run sudo gedit/etc/network/interfaces only reserved

Auto Lo iface lo inet loopback

Remove DNS settings sudo mv/etc/resolv.conf/etc/resolv.conf_backup

Then sudo vim/etc resolv.conf writes as follows:

NameServer 8.8.8.8

NameServer 114.114.114.114

After restart Network-manager service: sudo services Network-manager restart

Ubuntu installs pppoeconf after conflict with NetworkManager