I booted into recovery to see if there the network was working again.
It is a bug of Networkmanager. Probably the username 'power' doesn't affect the connection.
Solution:
sudo -H gedit /etc/NetworkManager/NetworkManager.conf
At the bottom of this file, copy and paste the following:
[device] wifi.scan-rand-mac-address=no
Restart the networkmanager
sudo service network-manager restart
I booted into recovery to see if there the network was working again.
It is a bug of Networkmanager. Probably the username 'power' doesn't affect the connection.
Solution:
sudo -H gedit /etc/NetworkMan ager/NetworkMan ager.conf
At the bottom of this file, copy and paste the following:
[device] rand-mac- address= no
wifi.scan-
Restart the networkmanager
sudo service network-manager restart