My setup: HP Blade server running Ubuntu 16.04 with wireless AccessPoint (TPLink something) and > 20 devices (Windows/Linux/Android/iOS). Ive been using my MBP happily ever since. It just worked. Server runs 24/7, as is AP. When I booted up my MBP today, it didnt connect to my wifi (I used it yesterday without any issues). What are steps I took: 1. apt-get update && apt-get upgrade 2. systemctl show eth0 Code: DHCP Monitoring Tools ====== eth0:: up/rw-:://fi ::DHCP reachable and OK 3. sdhcp-systest Code: DHCP mux=1 Domain=::1 #local SIP=f/deb PK sent/PK recv 0 1 1 1 1 0 1 1 1 1 (4 sent; 4 received) :: Ports Up/Reachable :: DHCP status: OK Everything seems to be ok; I can connect from all other devices, but not from MBP. How to fix it?