lars@T530:~$ dmesg | grep -i blue
[ 6.899717] Bluetooth: Core ver 2.17
[ 6.899731] Bluetooth: HCI device and connection manager initialized
[ 6.899737] Bluetooth: HCI socket layer initialized
[ 6.899740] Bluetooth: L2CAP socket layer initialized
[ 6.899744] Bluetooth: SCO socket layer initialized
[ 6.904211] Bluetooth: RFCOMM TTY layer initialized
[ 6.904221] Bluetooth: RFCOMM socket layer initialized
[ 6.904225] Bluetooth: RFCOMM ver 1.11
[ 6.928321] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.928325] Bluetooth: BNEP filters: protocol multicast
[ 6.928334] Bluetooth: BNEP socket layer initialized