If you are using latest feisty shipped kernel, please wait until ubuntu kernel maintainers updated the driver. It was figured out that there were merge mistakes and current feisty bcm43xx is completely broken.
-- [feisty] bcm43xx driver causes hard-lock on association https://launchpad.net/bugs/85318 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
