I am running Ubuntu 16.04 on Fujitsu UH552. Every thing has been working fine until I connected Bluetooth wireless headphone. My machine has qualcomm atheros ar9462 (wifi + bluetooth) module.
Problem: If I use both Bluetooth headphone and WiFi at the same time they interfere, WiFi slows down and audio on headphone has glitches. Any suggestion how to solve this issue?
Note:Upon googling I found this solution
sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi bt_coex_active=N"
but this is not working for me.