I've been at whit's ends for over 4 months with this issue on my HP-550 laptop. Finally after 2 more hours today, found this solution (09/2013), but it doesn't appear to 'remember' once I reboot. Not sure how to fix it now as I've spent hours reading online.
Once I "Term" the below, my Wireless top right bar comes alive in 13.04 and connects to my network; once I reboot/turn off, I lose it and have to go back into Term and do the B43 Modprobe again, a pain.
Now I would like a really simple quick solution to the B43 Modprobe solution as listed below website: http://linuxg.net/how-to-fix-broadcom-bcm4311-wireless-driver-on-ubuntu-and-linux-mint/:
This is what they said:
Remove the default driver:
$ sudo apt-get remove --purge bcmwl-kernel-source
Install a the Linux Firmware nonfree drivers:
$ sudo apt-get install linux-firmware-nonfree
Load the b43 module:
$ sudo modprobe b43
To make it work automatically, do:
$ sudo su
cho "b43" >> /etc/modules
Help most welcome. Thanks.