BTW, I got a feeling that I got more services failed after I enabled openvpn.service (like avahi). Also these problems did not disappear when I disabled openvpn.service and booted card. Same goes with modem problems. So, does NetworkManager or somebody else keep some data regarding OpenVPN set-up even though its been disabled. If so, would it be better managing OpenVPN connection with NetworkManager (-plugin) than using openvpn.service for that. Also is openvpn-plugin build automatically and get into use if tun interface is not configured as unmanaged?