Problem bluetoothd[978]: connect error: Connection refused (111) It's because the device have already paired with another OS with same dongle.Solved$ bluetoothctl #[bluetooth] remove XX:XX:XX:XX:XX:XX#[bluetooth] quit$sudo systemctl restart bluetooth.service$ bluetoothctl#[bluetooth] scan on#[bluetooth] pair XX:XX:XX:XX:XX:XX#[bluetooth] trust XX:XX:XX:XX:XX:XX