My Notebook(Acer Aspire S3) was affected by this bug, too. I resolved it by downgrading the kernel to 3.6.11.
You can download it under: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6.11-raring/
Maybe you have to load the driver with 'modprobe ath9k nohwcrypt=1', because of another older bug.
Good luck.
My Notebook(Acer Aspire S3) was affected by this bug, too. I resolved it by downgrading the kernel to 3.6.11.
You can download it under: kernel. ubuntu. com/~kernel- ppa/mainline/ v3.6.11- raring/
http://
Maybe you have to load the driver with 'modprobe ath9k nohwcrypt=1', because of another older bug.
Good luck.