Comment 4 for bug 72152

Here is how I get rid of this inconsistency :

in interfaces file I put those stanzas :

iface wlan0 inet manual
  wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp
  wpa-roam slave

iface home inet static
  wpa-roam slave
  address ...

With attached patch, "wpa_action wlan0 stop" is invoked when issuing "ifdown wlan0"