my first experiences with the Nano started in late December last year. That time I downloaded the only available preconfigured SD card image, which - if I remember correctly - was made with JetPack 4.4.
That time I started with a headless installation and had no problem to do the initial configuration using the micro USB serial connection. Later I plugged keyboard, mouse and monitor and all was fine.
Since I power supply the box from a barrel plug I had the micro USB port free and was quickly able to write me a REST API server and some host code, which communicated via the USB cable using IP 192.168.55.xx (I remember the Nano had the .1, my PC the .12 or so)…
Meanwhile I ran into some troubles which forced me to re-flash the SD. Now the downloadable image is containing JP 4.5 (jetson-nano-jp45-sd-card-image.zip) with which my DeepStream app had a problem (segmentation fault with one of the Python samples)
So I downloaded an earlier image (jetson-nano-sd-card-image-441.zip) from Jetson Download Center | NVIDIA Developer
My app did work again, but I was surprised: The USB device mode did not work out of the box as it did before.
What do I have to do in order to enable it again?