I've confirmed an issue exists with the 3.15.x kernel and have added a
temporary fix to the support documentation @ ThinkPenguin.com/support.
Besides reverting back to an older kernel you can simply make the following
modification:
1. Run the following from a terminal window:
sudo nano /etc/modprobe.d/ath9k_htc.conf
2. Add the following line and save:
options ath9k_htc nohwcrypt=1
3. Reboot
Your wireless adapter should now be working again.
* This is only applicable if you have a distribution with the 3.15.x kernel
and/or have upgraded to this kernel.
