roger@war:~/Downloads$ dmesg | grep -i blue
[    2.654463] usb 1-1.1: Product: Bluetooth USB Host Controller
[    7.388975] Bluetooth: Core ver 2.22
[    7.388993] Bluetooth: HCI device and connection manager initialized
[    7.388996] Bluetooth: HCI socket layer initialized
[    7.388998] Bluetooth: L2CAP socket layer initialized
[    7.389003] Bluetooth: SCO socket layer initialized
[   12.482380] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   12.482382] Bluetooth: BNEP filters: protocol multicast
[   12.482387] Bluetooth: BNEP socket layer initialized
[   21.356046] Bluetooth: RFCOMM TTY layer initialized
[   21.356056] Bluetooth: RFCOMM socket layer initialized
[   21.356062] Bluetooth: RFCOMM ver 1.11
[   34.021777] Bluetooth: hci0: last event is not cmd complete (0x0f)
[   50.010692] Bluetooth: hci0: last event is not cmd complete (0x0f)
[   66.012554] Bluetooth: hci0: last event is not cmd complete (0x0f)
[   82.011454] Bluetooth: hci0: last event is not cmd complete (0x0f)