dmesg | grep Bl
[17179604.868000] Bluetooth: Core ver 2.8
[17179604.868000] Bluetooth: HCI device and connection manager initialized
[17179604.868000] Bluetooth: HCI socket layer initialized
[17179604.888000] Bluetooth: L2CAP ver 2.8
[17179604.888000] Bluetooth: L2CAP socket layer initialized
[17179604.892000] Bluetooth: RFCOMM socket layer initialized
[17179604.892000] Bluetooth: RFCOMM TTY layer initialized
[17179604.892000] Bluetooth: RFCOMM ver 1.7
[17180735.664000] Bluetooth: HIDP (Human Interface Emulation) ver 1.1-mh1