I also have a dell 630m and also have some strange behaviour. Not 100% sure, but it seems the LED is on only when associated with a network. According to me, would be better to have it on when radio is on.
-- Wifi Status LED out of the box inoperative https://launchpad.net/bugs/21367 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
