I think I may have the same problem as this, symptoms are similar. I performed and aptitude full-upgrade earlier this week. This installed a new kernel 4.4.0-71 amongst other package updates. After a reboot NetworkManager applet was stating 'Device not ready' for the wifi device. I went back to an earlier kernel, but the symptoms are the same.
My wifi device is Intel Centrino Advanced-N 6205 [Taylor Peak] To work around the problem I disable wifi, restart NetworkManager and enable wifi. The wifi then connects. The following three commands get the system working fine. nmcli radio wifi off systemctl restart NetworkManager sleep 5 nmcli radio wifi on -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1659750 Title: Wifi does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1659750/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
