Ubuntu – WiFi and Bluetooth coexistence: Qualcomm Atheros ar9462: Ubuntu 16.04


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.

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.

Best Answer

Since yours is an Atheros wireless device and not an Intel, it is not surprising that a driver parameter for an Intel is not working. Let's try a better option:

sudo -i
rm /etc/modprobe.d/iwlwifi-opt.conf
echo "options ath9k btcoex_enable=1"  >  /etc/modprobe.d/ath9k.conf

Reboot and let us hear your report.

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