NetworkManager on Debian says: Device not managed
Just upgraded NetworkManager and nm-applet among other things and got this in the nm-applet popup that normally displays the available networks:
device not managed
The fix is in this Debian bug report:
Either (a) edit
/etc/network/interfacesto comment out the interfaces you want NetworkManager to handle or (b) changemanaged=falsetomanaged=truein/etc/NetworkManager/nm-system-settings.conf.sudo killall nm-system-settings
(It doesn't look like you need
to bounce /etc/init.d/networking or
/etc/init.d/network-manager—I tried those but
that nm-system-settings process is what you really
need to kill.) If you can read this the Debian laptop
is back on the net.