Comment 20 for bug 305606

Hello, Aurélien's solution did not work for me either, after making the necessary changes to both the interface and the nm-system-settings.conf files I got this

vic@rebuffat:~$ sudo /etc/init.d/networking restart
sudo: unable to resolve host rebuffat
 * Reconfiguring network interfaces...
WARNING: ifup -a is disabled in favour of NetworkManager.
  Set ifupdown:managed=false in /etc/NetworkManager/nm-system-settings.conf.
                                                                                                  [ OK ]

But the funny part is that when I go back to edit the nm-system-settings.conf file, the boolean is still set to true ...

vic@rebuffat:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

vic@rebuffat:~$ cat /etc/NetworkManager/nm-system-settings.conf
[main]
plugins=keyfile

[ifupdown]
managed=true

The applet always shows the warning sign telling me that the device is unmanaged....