Having the same issue, tried all different kernels and patches with no luck. Found this thread here and have some hope. I have both the m.2 and usb versions of the coral. So I have a pcie usb 3.2 adapter card coming tomorrow and I am going to try to pass the card through instead of the m.2 and hook up the usb version see if I can get some performance. I'll let ya guys know if it is acceptable speed.