Running Ubuntu, like most mainstream Linux distribution, means nowadays automatically that your computer gets exposed to the NetworkManager and its sideeffects. Maybe this tool might work for some desktop users, but it definitely never worked for me. It is cumbersome to configure, doesn’t like if an interface is managed manually or you want to change it back to automatic. It has major problems with similar IP ranges for different locations…
Anyways, I digress. I tried a lot of versions of the NetworkManager and it actually got worse and worse. Switching back to manually editing /etc/network/interfaces is not really spouse compatible either. The decision was made, lets install an alternative: wicd.
I think there is enough on the internet on how to transition from NetworkManager to wicd, like this official one here from Ubuntu’s own help pages.
After all is set and done you should have wicd running and you should be able to use the widget of your favorite desktop environment to configure it. But not so in my case. All I saw was that wicd failed to start. And a lot of digging unvealed finally a bug and it is even filed (Launchpad Bug Report).
In short, it is a problem with how the symlinks for resolv.conf are set up. So here is the quick workaround to get wicd to work:
ln -s /run/resolvconf/resolv.conf
ln -s /run/resolvconf/resolv.conf /var/lib/wicd/resolv.conf.orig
After that sequence you should be able to start wicd. Happy networking.