PSSwitcher uses HAL to see any device added via UDI that gets registered and like mentioned earlier HAL is not registering any UDI for the connected device in some bt headset cases and I don't know how I can detect the connected device. Hopefully someone here can suggest something for this. I'm using S9 motorolla bt headset and UDI "/org/freedesktop/Hal/devices/computer_logicaldev_input_1" is registered when connected and this' how I'm getting it to work.