dmesg | grep Blue
[    1.794532] Bluetooth: Core ver 2.17
[    1.794545] Bluetooth: HCI device and connection manager initialized
[    1.794551] Bluetooth: HCI socket layer initialized
[    1.794555] Bluetooth: L2CAP socket layer initialized
[    1.794559] Bluetooth: SCO socket layer initialized
[    1.798460] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    1.798462] Bluetooth: BNEP filters: protocol multicast
[    1.798468] Bluetooth: BNEP socket layer initialized
[    1.815303] Bluetooth: RFCOMM TTY layer initialized
[    1.815315] Bluetooth: RFCOMM socket layer initialized
[    1.815318] Bluetooth: RFCOMM ver 1.11