For me the problem is solved, read the solution here http://askubuntu.com/questions/783650/problem-with-dns-in-the-latest-kubuntu-16-04-update
I had the same problem with the latest 16.04 updates. Fixed as follows: Remove (or comment out) the below line from /etc/NetworkManager/NetworkManager.conf: dns=dnsmasq Run service NetworkManager restart -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434986 Title: Not working network connection after boot To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1434986/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs