Ok. We'll try and do this step by step. Just in case you haven't done it yet, install b43-fwcutter, thus:
1/ Boot into Ubuntu. Once you're at the desktop, insert the CD you installed Ubuntu with.
2/ Open a terminal and apply these two commands, one at a time, hitting return between each (wait for each to do their thing and you're back at a cursor before applying the next command):
Now, download this file:
sudo dpkg -i b43-fwcutter*
b43 (12.04 Precise Pangolin) - http://mirror2.openwrt.org/sources/b...mipsel.tar.bz2
(From the link given in the other posts.) Once you have that copy it to your /home folder, then these two commands, one after the other with return between:
Reboot the computer and see what happens. At the least, we should have b43-fwcutter and firmware-b43-installer installed.
tar xfvj broadcom-wl-184.108.40.206.3_mipsel.tar.bz2
sudo b43-fwcutter -w /lib/firmware broadcom-wl-220.127.116.11.3/driver/wl_apsta/wl_prebuilt.o
If you have any probs, post back. If you get that done and restart and you get nothing, run this command:
... and post the result.
PS: Absolutely no way you can get an ethernet cable to the computer? Anyways, let's hope this works.