Faça dois favores pra mim:
1o. Poste um screenshot da tela Sistema > Administração > Rede
2o. Execute (no console) o seguinte comando: sudo wifi-radar
Poste aqui as mensagens que irão aparecer no console e se funcionou.
Fico no aguardo!
Após o comando sudo wifi-radar:brunolima@ubuntu:~$ sudo wifi-radar
Password:
dhclient3 --version 2>&1
/usr/sbin/wifi-radar:1921: GtkDeprecationWarning: gtk.threads_init is deprecated, use gtk.gdk.threads_init instead
gtk.threads_init()
eth2 Interface doesn't support scanning.
eth2: error fetching interface information: Device not found
eth2 No such device
/usr/sbin/wifi-radar:839: GtkDeprecationWarning: gtk.threads_enter is deprecated, use gtk.gdk.threads_enter instead
gtk.threads_enter()
/usr/sbin/wifi-radar:877: GtkDeprecationWarning: gtk.threads_leave is deprecated, use gtk.gdk.threads_leave instead
gtk.threads_leave()
eth2 Interface doesn't support scanning.
eth2: error fetching interface information: Device not found
eth2 No such device
eth2 Interface doesn't support scanning.
eth2: error fetching interface information: Device not found
eth2 No such device
eth2 Interface doesn't support scanning.
eth2: error fetching interface information: Device not found
eth2 No such device
brunolima@ubuntu:~$
........................
Screenshot: