lsusb; dmesg | egrep -i 'blue|firm' If it says something like
[ 6.019483] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_fw.bin [ 6.019814] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761b_fw.bin failed with error -2 [ 6.019818] Bluetooth: hci0: RTL: firmware file rtl_bt/rtl8761b_fw.bin not found Simply put
rtl8761b_fw.bin rtl8761b_config.bin into
/lib/firmware/rtl_bt and replug the bluetooth module.
Voilà