On Wed, Jul 28, 2021 at 09:24 AM, Gregg wrote:
The Pi is connected to the 991A by a USB cable only.
I would try to avoid using the USB 3.0 connections for this. I've noticed that they are a bit finicky.
Also you might want to ensure that you reboot the Pi after you've made the USB connections. It's supposed to pick up the new connection, but I've seen issues with that as well.