/etc/network/interfaces configuration file is not used by network manager (which is used by default in fiesty). From the networkmanager doc:
Network Manager has been installed on your system, however it will not immediately be able to manage your network interfaces. To avoid problems with important configuration being ignored, or strange behaviours, the Ubuntu version will not manage any network interface configured in the /etc/network/interfaces file.
http://www.ubuntugeek.com/how-to-fix-sl ... ptops.html
Behövs nog lite labbar för detta...
