The issue seems to have become worse for me as not even dhclient will get me an IP address after boot on my ipw2200 (Dell Inspiron 1300). The only resolution to the problem is opening networkconfig and decativating then reactivating the wireless card. That will make it get an IP address but only then will that work.
-- Wireless network interface (ipw2200) does not have IP address after boot https://launchpad.net/bugs/34505 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs