LED doesn't dim / OneRNG don't work

[Zhavok]

Hi :)

If I test my OneRNG (Version 3.0), with 
$ cat /dev/random >/dev/null
the LED doesn't dim. I installed this packages like the tutorial:
$ sudo apt-get install rng-tools at python-gnupg openssl
because I use an Debian sid, python-gnupg was not available. I downloaded and installed from here: https://debian.pkgs.org/10/debian-main-amd64/python-gnupg_0.4.4-1_all.deb.html. After that, I installed the onerng_3.6-1_all.deb. If I test it the LED doesn't change the brightness.

I sampled some Outputs to debug:

$ systemctl status rng-tools
rng-tools.service - LSB: Hardware random number generator entropy gatherer daemon
     Loaded: loaded (/etc/init.d/rng-tools; generated)
     Active: active (running) since Mon 2020-11-09 17:32:22 CET; 19min ago
       Docs: man:systemd-sysv-generator(8)
    Process: 3599 ExecStart=/etc/init.d/rng-tools start (code=exited, status=0/SUCCESS)
      Tasks: 1 (limit: 9360)
     Memory: 280.0K
     CGroup: /system.slice/rng-tools.service
             └─3604 /usr/sbin/rngd -r /dev/ttyACM0


$ sudo dpkg --list onerng | tail --lines 1
ii  onerng         3.6-1        all          Driver for the OneRNG open source hardware entropy generator


$ sudo dmesg | grep usb
[ 1080.796195] usb 2-2: USB disconnect, device number 7
[ 1088.128165] usb 2-2: new full-speed USB device number 8 using xhci_hcd
[ 1088.279672] usb 2-2: New USB device found, idVendor=1d50, idProduct=6086, bcdDevice= 0.09
[ 1088.279677] usb 2-2: New USB device strings: Mfr=1, Product=3, SerialNumber=3
[ 1088.279681] usb 2-2: Product: 00
[ 1088.279683] usb 2-2: Manufacturer: Moonbase Otago http://www.moonbaseotago.com/random
[ 1088.279686] usb 2-2: SerialNumber: 00


$ sudo dmesg | grep ttyACM
[    5.098289] cdc_acm 2-2:1.0: ttyACM0: USB ACM device


$ lsmod | grep cdc_acm
cdc_acm                45056  3
usbcore               323584  9 xhci_hcd,ehci_pci,usbhid,cdc_acm,uvcvideo,ehci_hcd,ath3k,btusb,xhci_pci


$ sudo lsusb -v
Bus 002 Device 011: ID 1d50:6086 OpenMoko, Inc. OneRNG entropy device
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        32
  idVendor           0x1d50 OpenMoko, Inc.
  idProduct          0x6086 OneRNG entropy device
  bcdDevice            0.09
  iManufacturer           1 Moonbase Otago http://www.moonbaseotago.com/random
  iProduct                3 00
  iSerial                 3 00
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0043
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              200mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      1 AT-commands (v.25ter)
      iInterface              0 
      CDC Header:
        bcdCDC               1.10
      CDC ACM:
        bmCapabilities       0x06
          sends break
          line coding and serial state
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      CDC Call Management:
        bmCapabilities       0x00
        bDataInterface          1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0020  1x 32 bytes
        bInterval              64
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              4 Random
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
  (Bus Powered)

$ sudo grep OneRNG /var/log/messages
Nov  9 17:31:48 debian OneRNG: firmware verification passed OK - version=3

$ sudo grep ttyACM /var/log/messages
Nov  9 17:31:43 debian kernel: [ 1930.499805] cdc_acm 2-2:1.0: ttyACM0: USB ACM device


Sry for my bad english. I hope you can help me :)