dmesg :
[   23.772000] Bluetooth: Core ver 2.11
[   23.772000] Bluetooth: HCI device and connection manager initialized
[   23.772000] Bluetooth: HCI socket layer initialized
[   23.800000] Bluetooth: L2CAP ver 2.8
[   23.800000] Bluetooth: L2CAP socket layer initialized
[   23.932000] Bluetooth: RFCOMM socket layer initialized
[   23.932000] Bluetooth: RFCOMM TTY layer initialized
[   23.932000] Bluetooth: RFCOMM ver 1.8

cat /var/log/syslog :
Nov 18 02:58:51 Juventus bluetooth-monitor: Bluetooth monitoring system startup, version 1.4 
Nov 18 02:58:51 Juventus bluetooth-monitor: No Devices Specified