I had the same issue with a Dell Vostro 3560 with the same card.
I created the /etc/modprobe.d/ath9k.conf file and the problem disappeared.
I'm running Ubuntu 12.04 64-bit 3.2.0-32-generic
I had the same issue with a Dell Vostro 3560 with the same card.
I created the /etc/modprobe. d/ath9k. conf file and the problem disappeared.
I'm running Ubuntu 12.04 64-bit
3.2.0-32-generic