Ryzen + RX 580 only one device working

[mfoolb]

-D 1,2 means that both GPUs and CPUs are whitelisted

Thanks.

Anyway now I have confirmation that something is not working as it should.

The device #2 is the GPU and it works at 220kH/s.
The device #1 is the CPU (Ryzen 7 1700x 8 core OC @3.8Ghz) but it works at only 5kH/s (on a laptop a AMD A12-9720P work under windows at 20kH/s).

Where should I investigate?

Thanks in advance.