I have hp-elitebook-8460p running on Ubuntu 18.04.4 LTS. But battery life worst it's around 1hour 30 minutes with basic usage. I tried tuning with tlp, powertop. I lately noticed this from powertop
7.18 W 0.0 pkts/s Device Network interface: enp0s25 (e1000e)
here the full screenshot. I thought that it was Ethernet port (correct me if I wrong ). can anyone help me how to disable it.
// any battery saving tips, appreciated.