There are a lot of topics about this but none of them helps . when i try to change profile of my headphones to a2dp it gives me following error on blueman .

Before i was able to connect only disconnecting after initial connection and connecting back through the buttons on my headphones but it doesn't work anymore.

when i try to load bluetooth discover module using the command pactl load-module module-bluetooth-discover i get Failure: Module initialization failed error.

At the moment i can only connect to hsp/hfp profile which results sounds from star trek


Setting line in /etc/bluetooth/main.conf to

MultiProfile = single

helped me to switch profile on a2dp_sink. After changing file you need to restart bluetooth service. My system is Xubuntu 18.04.

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