Nick
You can have a virtual device, as long as it can handle the input of voice/text. It doesn't have to be a real device.
How are you running this?
Seems like there's an error querying your device. You can debug with `py -m googlesamples.assistant.grpc.audio_helpers`.
If you don't have the source code, but just the library you downloaded through pip, it's a different command that's in our readme.
No there's no parameter to set the screen size. But you do get HTML, which you could modify with an additional block of CSS if necessary.
Can you try the pushtotalk sample and see what is coming back?
Maybe the `supplemental_display_text` doesn't return data for specific queries.
You need to follow the steps to [register the device model](https://developers.google.com/assistant/sdk/guides/service/python/embed/register-device).
Are you still seeing this issue?
We are aware of the limitation of only the last display text being sent.