Dell XPS 13 9350 - Screen flickering, cursor and keyboard back light problems

Thanks for the help. Like you asked I've gathered the spec of me system. ?

I also updated and upgraded my system with the following command : sudo apt-get update && sudo apt-get dist-upgrade...

What I didn't understand completely is the process with the network cable. To boot and update the system. Is this something I accomplished with the commands from above or do I have to do this as well