Getting Broadcom wireless drivers working in Ubuntu 11.04

Installing the default Broadcom driver didn't work. (System > Administration > Additional Drivers)

Solution found here:
http://askubuntu.com/questions/38327/broadcom-bcm4311-wireless-not-working

• Open Synaptic Package Manager and uninstall bcm-kernel-source

• Install b43-fwcutter

• Then install firmware-b43-installer (this one didn't show up for me until b43-fwcutter had been installed)

In Terminal do:
cat /etc/modprobe.d/* | egrep '8180|acx|at76|ath|b43|bcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|witch|wl'
See if the term blacklist bcm43xx is there. If it is, it needs to be commented out.

Edit the file:
sudo gedit /etc/modprobe.d/blacklist.conf
Put a # in front of the line: blacklist bcm43xx:
# blacklist bcm43xx

• Save the file

• Reboot