Hi Marcel, > I tried it with a Fujitsu-Siemens BlueCore4-External flashed with a 2.1 > firmware. That was the one I had laying on my desk. I've tried then with a Belkin F8T017 v2.1 + EDR usb dongle Class 1 on Ubuntu 2.6.31.6 Bluez 4.51 hciconfig hci0 commands gives me 'Read Inquiry Transmit Power Level' 'Write Inquiry Transmit Power Level' So now hciconfig hci0 inqtpl : hci0: Type: USB BD Address: 00:19:0E:XX:XX:XX ACL MTU: 1021:8 SCO MTU: 64:1 Inquiry transmit power level: 0 but hciconfig hci0 inqtpl 1 nothing . Analyzing packets on on hci0 I got the same result as you in the previous mail but while reading TPL, but while trying to write TPL for example to level 4 I got this with hciconfig hci0 inqtpl 4 # hcidump -X -V HCI sniffer - Bluetooth packet analyzer ver 1.42 device: hci0 snap_len: 1028 filter: 0xffffffff < HCI Command: Write Inquiry Response Transmit Power Level (0x03|0x0059) plen 1 level 4 > HCI Event: Command Complete (0x0e) plen 4 Write Inquiry Response Transmit Power Level (0x03|0x0059) ncmd 1 status 0x00 keeping TPL to 0 level. I'm waiting another Belkin that should be CSR based as linked on CSR website, is F8T016 and is Class 2, hoping will work, but I would know: does TPL work only for Class 1? Is 0 a valid level? Best Regards -- Natale -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html