if you are on Intrepid and still cannot use wifi with an Atheros card , you need to do two things, 1) install linux-backport-modules and 2) blacklist ath_pci and ath_hal.
To install the backport modules, just search for it on Synaptic or use apt-get or aptitude, it’s called linux-backports-modules-intrepid. Then on System/Administration/Hardware Drivers make sure Atheros driver is activated.
sudo aptitude install linux-backports-modules-intrepid
To blacklist the old modules, do this:
gksudo gedit /etc/modprobe.d/blacklist
And add the following lines At the bottom of the file save and exit
Now you need to reboot your system.
IF after this steps you still cannot make it work, you probably have something left still blacklisting ath5k, thus making it not to load. You should search all the files on /etc/modprobe.d for all lines that had:
And add a # before the start of the line, thus making it into a comment so the above one becomes
# blacklist ath5k
Save and exit the file