many thaks for this I am now in the bluetooth group, but still nothing shows when scannning for devices

Hi, I am new to rraspberry pi and have "ubuntu mate" up and running, I have problems getting bluetooth to scan , I have the following message when running "john@john-pi:~$ /etc/init.d/bluetooth status" from the commannd line ct 02 14:36:40 john-pi bluetoothd[552]: hci0: Start Discovery (0x0023) fail...