I found this solution worked on D630 laptops with the Broadcom BCM94321MC wireless but not on the Broadcom BRCM94311MCG wireless cards. The sticker on the bottom of the laptop displays the wireless chipset.
edwardr wrote:Try this. Connect the laptop to the internet using a wired connection then run the "Software Sources" tool from "Menu->Preferences->Software Sources" and click on the "Additional Drivers" tab. You should see a recommended driver for "Broadcom" or "wireless". Select it and install it. You may need to logout and back in, or restart, I'm not sure. Let us know if it works!