did you try to use the following command : sudo /usr/share/bcm43xx-fwcutter/install_bcm43xx_firmware.sh
it workded for me even if i have to deactivate then reactivate the interface at each boot ** Changed in: Ubuntu Status: Unconfirmed => Needs Info -- BCM4306 / BCM2050 802.11 b/g wireless card fails to see networks in Dapper, works with ndiswrapper, but additional steps needed https://launchpad.net/bugs/50870 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs