I am sure someone already have done this. I could however not find it.

I would like the abillity to close down everything but 2g on screen close and that it enables back to normal on screen open. I don't know if this would help battery charge in practic but in my mind it should do it in theory.

Does someone sit on a howto for this. A dbus-script or something? Maybe this will be possible when Sheperd is released?