No ethernet connection after installing Ubuntu-Mate 18.04.1 Bionic

Support & Help Requests
1

Hi,
after installing Ubuntu Mate 18.04.1 Bionic Beaver onto HP 250 G6 Notebook PC I can’t setup the Ethernet connection in order to get the help.

What I did and what didn’t work:

  1. In Network Connections GUI (top right icon) I created a new Ethernet connection and entered IP address, subnet mask, DNS servers etc which worked ok in Ubuntu 16.04 installation. Same data entered into “Wired connection”. ping google* just shows packets being transmitted and 0 received.

  2. I modified /etc/network/interfaces then changed to default. Also modified resolv.conf to enter DNS server addresses then changed to default (nameserver 127.0.0.53). Now there seem to appear 2 additional resolv.conf related files in etc directory: resolve.conf and resolv.conf.save (one of them seems to be empty despite restoration to default).

  3. I successfully activated ethernet connection via “nmcli up” command. Various nmcli commands (from man nmcli) show active status and full connectivity of ethernet connection on recognized network interface, also correct assigned IP, DNS etc, but “ping google*” renders packets being transmitted and 0 received.

  4. I modified 01-network-manager-all.yaml file under “netplan” directory as was mentioned in the internet for the new network management system in 18.04. from
    default

network:
version: 2
renderer: NetworkManager

to something similar to (provided at netplan.io as examples) except for another prefix for IP denoting the relevant subnet mask
network:
version: 2
renderer: networkd
ethernets:
enp3s0:
addresses:

  • 10.10.10.2/24
    gateway4: 10.10.10.1
    nameservers:
    search: [mydomain, otherdomain]
    addresses: [10.10.10.1, 1.1.1.1]

“ping google*” still rendered packets being transmitted and 0 received. So I restored the .yaml file to default (managed by Network Manager).

Also after plugging in the ethernet cable into the new installation of Ubuntu Mate 18.04 Bionic top right notifications that
your’re connected/disconnected have been displayed on step 1) and have not been displayed at steps 2-4). So now there are no notifications
that you’re connected displayed after connecting the ethernet cable.

Is it possible to get any help on establishing the wired ethernet connection on Ubuntu Mate 18.04 on this forum?