Get wireless working on a Dell Inspiron 8500 in Ubuntu
First, you should check to be sure that you have the same wireless card (BCM4306 rev 02) that I do using the lspci command:
maryjo@lubuntu-mjh:~$ lspci -vvnn | fgrep 14e4 02:00.0 Ethernet controller : Broadcom Corporation BCM4401 100Base-T [14e4:4401] (rev 01) 02:03.0 Network controller : Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller [14e4:4320] (rev 02)
If everything matches, you should be able to follow the steps below to get wireless working on your laptop.
sudo apt-get -y install firmware-b43legacy-installer