Hi - running Ubuntu under windows 10. Ran the command "lsusb | grep MyriadX" , get the following result:
ian@IEADellLaptop:$ lsusb | grep MyriadX
ie. gives no output.
So what technique are you using to run Ubuntu? If you're running it as a Windows Subsystem, the last I knew USB wasn't supported by Linux inside Windows.
For VirtualBox USB setup, see here: