I'm using a TP-LINK TL-WN781ND Wireless N card with an AR9285 chipset and an ath9k driver on Xubuntu 12.04.1 with Network manager.
iwconfig wlan1
shows that it's using a bit-rate of 54 Mb/s. Is there a way (e.g. through an 'options' entry in /etc/modprobe.d/ath9k.conf
) of forcing it to use mode N? My router is doing 'Mode B/G/N Mixed'.
sudo iwconfig wlan0 modu 11n
, and for the module options, have a look atmodinfo ath9k
. That said, there is probably a reason it uses 11g. Are there 11g only devices that connect to the router? If not, try disabling the mixed mode on the router.