Intel® Distribution of OpenVINO™ Toolkit
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Run object_detection_demo_ssd_async sample with Movidius NCS on Ubuntu16.04: Unknown device


I was trying CV SDK in version 2018.2.319 on Ubuntu16.04, running the object_detection_demo_ssd_async  sample with myriadPlugin, but I got problem shown as below:

End with [ERROR] Unknown device

What could be the problem?



sudo ./object_detection_demo_ssd_async -i /dev/video0 -m MobileNetSSD_deploy.xml -d MYRIAD

    API version ............ 1.1
    Build .................. 12419
[ INFO ] Parsing input parameters
[ INFO ] Reading input
[ INFO ] Loading plugin

    API version ............ 1.1
    Build .................. 12419
    Description ....... myriadPlugin
[ INFO ] Loading network files
[ INFO ] Batch size is forced to  1.
[ INFO ] Checking that the inputs are as the sample expects
[ INFO ] Checking that the outputs are as the sample expects
[ INFO ] Loading model to the plugin
[ ERROR ] Unknown device

0 Kudos
2 Replies

Hi Monica,

Have you loaded the usb rules for the MYRIAD device. They can be found in /opt/intel/computer_vision_sdk/deployment_tools/documentation, click OpenVINO_Deployment_Tools_documentation.html, click Inference Engine Developers Guide, and then scroll down and click MYRIAD at the bottom of the page are instructions on how to load the USB rules for MYRIAD. Let me know if this helps as I've successfully ran the sample on MYRIAD but i'm also on R3 which is now the latest OpenVINO release.

Kind Regards,

Monique Jones


Hi Monique,

I'm sure I have loaded the 97-usbboot.rules in /etc/udev/rules.d.

I've successfully run the hello_ncs_cpp in NCSDK2 :

/workspace/ncsdk2/examples/apps/hello_ncs_cpp/cpp$ ./hello_ncs_cpp 

Hello NCS! Device opened normally.
Goodbye NCS!  Device Closed normally.
NCS device working.


In fact, I succeeded in running the samples before I reinstalled the openvino R2. 

I have tested in so some ways:

1) reinstall R2 with root privilege (fail)

2)run ncsdk2 (success )

3)  lsusb (success)(with 2 movidius sticks)

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 006: ID 8087:0a2a Intel Corp. 

Bus 001 Device 004: ID 05c8:038e Cheng Uei Precision Industry Co., Ltd (Foxlink) 

Bus 001 Device 057: ID 03e7:2150  

Bus 001 Device 055: ID 03e7:2150  

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


I am so confused about the problem. Looking forward to your reply.


Best Regards,

Monica Wu.