Jtdcftul

I had this problem with 2 different laptops with 18.04 Ubuntu. Wifi is working normal, until I want to connect a bluetooth speaker then it is hanging. SO I cannot listen to music with a bluetoot speaker from the internet. There are several topics on this, but I needed a full day to figure out what is the solution, so I describe it here with proper, but simple explanation. Because quite often you just find a command, and do not know what the hell is that doing.

The key is that your bluetooth and wifi is disturbing each other, because they operate on similar frequencies. The solution is that there is a setting that helps to resolve this, and this is to switch on a certain mode called "bt_coex_active".

First, how to find out what wifi adapter you have?

lshw -C network

I get this:

b@Lenovo-ideapad-330S:~$ lshw -C network

ATTENTION: ce programme devrait être lancé en tant que super-utilisateur.

  *-network                 

       description: Interface réseau sans fil

       produit: QCA9377 802.11ac Wireless Network Adapter

       fabriquant: Qualcomm Atheros

       identifiant matériel: 0

       information bus: pci@0000:01:00.0

       nom logique: wlp1s0

       version: 31

       numéro de série: 50:5b:c2:fe:e7:6b

       bits: 64 bits

       horloge: 33MHz

       fonctionnalités: bus_master cap_list ethernet physical wireless

       configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-45-generic firmware=WLAN.TF.1.0-00002-QCATFSWPZ-5 ip=192.168.178.29 latency=0 link=yes multicast=yes wireless=IEEE 802.11

       ressources: irq:126 mémoire:b1000000-b11fffff

That is how I know, my driver is ath10k_pci. I am sure, the same solution works for ath9k too, about other adapters I am not sure.

Now, the solution is simply to go to the folder /etc/modprobe.d and create a settings for this driver. I think, the filename is not important, but it is better, if it has thaóe same name as your driver, with a "conf extension". In my case ath10k_pci.conf.

I find it the easiest to use gedit and save the file there from the editor. But, because this folder is protected, you need for this the "sudo" command.

So:

cd /etc/modprobe.d/

Then:

sudo gedit

This asks for your password, as sudo always does.

In the text editor you put this:

options ath10k_pci bt_coex_active=Y

It is important that you put your driver name. Also the "Y" is important. You can find on the internet many "solutions" with "1", that does not work.

Then you save the file as ath10k_pci.conf.

After reboot this will work.

If you do not want to wait for the reboot, but try it out, you need to reset modprobe and restart bluetooth ser

vice:



sudo service network-manager stop



sudo modprobe -rfv ath10k_pci



sudo modprobe ath10k_pci



sudo service network-manager start

If that did not work, you missed something. It definitely worked for me. I can also see this with the command

iwconfig wlp1s0

You have to replace "wlps0" with your name of the wifi. It is more often wlan0.

You should see something like:

Link Quality=37/70  Signal level=-73 dBm 

This is not very good, but 37 and 70 was lower before. And the signal level gets better if I go closer to my wifi router.

Good luck!