BlueR: Method doesn't exist

[Tyrn]

Hi,

I'm relatively new to Rust and absolutely new to Bluetooth. Right now I'm playing with the official examples.

$ cargo run --example le_advertise
    Finished dev [unoptimized + debuginfo] target(s) in 0.10s
     Running `target/debug/examples/le_advertise`
Advertising on Bluetooth adapter hci0 with address 00:1B:10:00:2A:EC
Advertisement { advertisement_type: Peripheral, service_uuids: {123e4567-e89b-12d3-a456-426614174000}, manufacturer_data: {}, solicit_uuids: {}, service_data: {}, advertisting_data: {}, discoverable: Some(true), discoverable_timeout: None, system_includes: {}, local_name: Some("le_advertise"), appearance: None, duration: None, timeout: None, secondary_channel: None, min_interval: None, max_interval: None, tx_power: None, _non_exhaustive: () }
Error: Error { kind: Internal(DBus("org.freedesktop.DBus.Error.UnknownMethod")), message: "Method \"RegisterAdvertisement\" with signature \"oa{sv}\" on interface \"org.bluez.LEAdvertisingManager1\" doesn't exist\n" }

The curious point: I've deployed the BlueR project on two boxes, and on one of them le_advertize runs fine. Both boxes are powered with Manjaro KDE; the "good" one is a laptop with integral Bluetooth, the "bad" one is a desktop with a noname USB Bluetooth dongle. The dongle is not dead; at least, scanning from the (Bluedevil?) GUI works, the advertizing laptop is visible.

What should be my first step?

[Rustaceous]

Do the two systems have the same version of BlueZ?

[Tyrn]

Certainly.

[Tyrn]

It looks like the trouble has nothing to do with software. On the "good" box I see, among other things,

$ bluetoothctl show
...

Roles, GAP, GATT; none of these on the "bad" box. The dongle is, probably, BR/EDR, not BLE. Am I correct?