Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter -- Ubuntu 14.04

I had the same problem, found a solution on a forum and it worked for me. I am using a Toshiba Satellite L750 with Qualcomm Atheros AR9585 and my wi-fi was hardware blocked. So I did what was said in that forum. I simply rebooted and immediately I pressed my wi-fi activation keyboard combination (FN+F8) and the led for wi-fi turned on and so my wi-fi was hardware unblocked.

I've got the similar problem with ath9k driver.
I solved this problem with a workaround that I found here.

echo "options asus_nb_wmi wapf=4" | sudo tee /etc/modprobe.d/asus_nb_wmi.conf

This command that I've inserted above change the default behavior of ath9k.
After this change I noticed a strange things because network led indicator says that I'm offline, but I can go online through my wireless network card.

I hope this could help you.