Comment 20 for bug 1620636

I got it to work, but you need to set it up manually every time you reboot. First I close bluetooth and bluez by effectively stopping them (not restarting), then starting them again using systemctl stop/start bluetooth and sudo /etc/init.d/bluetooth start/stop. Then I start bluez manager and connect my device using setup via audio sink. Then you have to manually change sound to the headphones. I am a newbie with scripts, maybe someone more experienced than me can make a script that does all these actions at boot.