Question about running modetest

I want to run the modetest tool for DRM functionality testing on OrinNX, but when I simply execute modetest, it says that the device is not found. Also, there is no /dev/drm directory.

I was able to execute modetest when using an ARM GPU because /dev/drm was found, but I assume that it is not found on Nvidia’s OrinNX, so I cannot execute modetest. What can I do to be able to run modetest?

Any idea?

For DRM, do you mean Direct Rendering Manager? If yes, please refer to the document and try the 08 sample:
Jetson Linux API Reference: 08_video_dec_drm (Direct Rendering Manager) | NVIDIA Docs

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