I have 12.04 on an Acer 3690 and everything works perfectly except for the wireless internet. It says "Firmware Missing". I've already done the additional drivers thing, and that didn't help. Any suggestions? I'm new to ubuntu, so make them easy to understand :) Thanks!
I am not sure if this will solve your problem, but no harm in trying right?
I had a similar problem in my Acer laptop. I think the new kernel and broadcom drivers are the connection. I ran
and it worked for me on my Acer Laptop.
Refer Ubuntu 12.10, Wireless not working for more details.