inxi -n doesn't work but sudo iwlist pan0 auth gives 'pan0 no authentication information.
Which means it is not wifi but blue tooth like jay stated. Install a newer version of Linux Mint like Jay pointed you to. Your wireless will work out of the box with a newer kernel in a newer inux Mint release.

The poster Wifi on Linux Mint is running a newer kernel than you in Suse 12. That is why when you do

lsmod | grep ath9k doesn't give anything!

modprobe ath9k gives -

WARNING: All config files need .conf: /etc/modprobe.d/ndiswrapper, it will be ignored in a future release.
WARNING: Error inserting cfg80211 (/lib/modules/2.6.28-11-generic/kernel/net/wireless/cfg80211.ko): Operation not permitted
WARNING: Error inserting mac80211 (/lib/modules/2.6.28-11-generic/kernel/net/mac80211/mac80211.ko): Operation not permitted
FATAL: Error inserting ath9k (/lib/modules/2.6.28-11-generic/kernel/drivers/net/wireless/ath9k/ath9k.ko): Operation not permitted
you get that error. Your kernel is too old or you did not use sudo in front of those commands.