- Open Terminal and run following commands
- sudo apt-get install linux-headers-generic build-essential
- wget http://www.orbit-lab.org/kernel/compat-wireless-3-stable/v3.6/compat-wireless-3.6.6-1-snpc.tar.bz2
- tar xvf compat*
- cd compat-wireless-3.6.6-1-snpc
- sudo su
- ./scripts/driver-select ath9k
- make
- make install
- modprobe ath9k
- exit