# /etc/pulse/default.pa
ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy auto_switch=false <-- add auto switch
.endif
.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover
load-module module-switch-on-connect <-- add this
.endif
# /etc/bluetooth/main.conf
[General]
Disable=Headset