I recently reinstalled my laptop with ubuntu gnome 16.10. I previously had 16.04 which was upgraded from 15.10, but this time I installed clean. My wifi-module works fine and I connect to networks successfully. On the first network, the internet is fine, but when I go to work for example (and thus switch wifi-network) I have to restart the network-manager for the internet to work. It will connect to the wifi-network, but the internet won't work.
Laptop: Dell XPS 13, 9350
EDIT 1: it doesn't (only?) happen after switching wifi, it happens everytime I suspend the laptop and unsuspend it (i.e. close the lid and open it again).