Hi Doug,
Could you share your .spec file that you used to generate the image? And what version of PYNQ are you using?
The /dev/dri/by-path directory is related to the zocl driver, it is responsible for accelerator memory allocation (kinda like OpenCL), which is why it appears in the path usually associated with graphics cards.
My guess is your .spec is either missing the xrt package or there’s some version mismatch between pynq and xrt.
Thanks
Shawn