in the terminal type "sudo edit /etc/NetworkManager/nm-system-settings.conf" change the "managed=false" to "managed=true" and then save it. then in the terminal type "killall nm-system-settings" and then reboot......
in the terminal type "sudo edit /etc/NetworkMan ager/nm- system- settings. conf" change the "managed=false" to "managed=true" and then save it.
then in the terminal type "killall nm-system-settings"
and then reboot......