Same issue on ubuntu-gnome 16.10 after resuming from sleep.
Network controller: Broadcom Limited BCM43602 802.11ac Wireless LAN SoC (rev 01) Hardware: Dell XPS 9550
It is required to restart the network manager.
There was the same issue in Ubuntu 16.04 6/7 months ago and it was fixed in an update.
Same issue on ubuntu-gnome 16.10 after resuming from sleep.
Network controller: Broadcom Limited BCM43602 802.11ac Wireless LAN SoC (rev 01)
Hardware: Dell XPS 9550
It is required to restart the network manager.
There was the same issue in Ubuntu 16.04 6/7 months ago and it was fixed in an update.