Ubuntu seems to currently (6/24/2014) have issues with the atheros bluetooth card.
Best fix so far:
I created a file [bluetooth-fix.conf] under /etc/modprobe.d with this line: options ath9k btcoex_enable=1 Enabling bluetooth coexistence Reboot Also:
Bluetooth coexistence has to be manually enabled when loading ath9k by setting the btcoex_enable module parameter.
modprobe ath9k btcoex_enable=1
By: F Alduraibi