I have recently tried to install Ubuntu 12.10 x64 over x32 and it installed, but now the wireless won't work. I have a BCM 4312 card for the wireless. I've tried pressing the wifi button on the computer, but it just stays orange. Also, I've tried a lot of different things and "wl" is non existent on my computer. I'm still trying to get the hang of this, so please explain and help!
UPDATE: So, it turns out I just needed to update my kernel to 3.8. I followed the instructions found at this thread: Why has wireless disappeared after my 12.10 upgrade?