If you patch the original kernel of breezy ( 2.6.12-10 ) with wireless extensions v18: http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/iw_we18-5.diff madwifi+wpa-psk+dhcp works fine. -- madwifi + wpa-psk auth + dhcp is not working https://launchpad.net/bugs/36238