I currently use an ASUS X441UA Laptop, and just moved from Windows to Ubuntu 21.10. Everything mostly works, except when using a Bluetooth device and Wifi at the same time.
Since I am new to Linux, I've searched this forum for users having the same problems as me (also with the same network adapter), so I would know a bit of diagnostic steps before reaching out here further but none of the solutions seems to be working.
I've tried lspci -knn | grep Net -A2 and here is the output:
03:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Lite-On Communications Inc QCA9565 / AR9565 Wireless Network Adapter [11ad:0662]
Kernel driver in use: ath9k
Kernel modules: ath9k
One of the solutions is to use 5GHz Wi-Fi, but unfortunately I can't do that because It seems like the network adapter only supports 2.4GHz connections. While browsing here I've also found someone suggesting to turn on "Bluetooth coexistence", so I've ran
sudo tee /etc/modprobe.d/ath9k.conf <<< "options ath9k btcoex_enable=1"
into the terminal and restarted the computer, It seems to work a little bit better (websites actually loads) but it is still far from usable for any usage.
I've ran a speedtest with both conditions. When the Bluetooth is completely turned off, I got 27Mbps down and 10Mbps up. When my wireless earbuds are connected and streaming audio it drops to 0.60Mbps down and 4Mbps up.
Since this is basically my first time using Linux, I don't know much about troubleshooting steps or any more solutions to the problem. I'm really sorry if I've made any mistakes on this post such as lack of info or unclear description.
Does anyone know any solutions? thanks in advance.
