@ShaneCCC, I see the same results on two of my identical 2GB Nano dev kits with the Arducam IMX477 Mini. With the stock Nvidia drivers, both on the latest L4T, I am only able to get v4l2-ctl working with one of them. I’ve tried both sensor modes (3840x2160 and 1920x1080 that the stock Nvidia driver provides). Let me know if there’s any particular debug I can get you. I also see those same video4linux video0: frame start syncpt timeout!0 messages on the non-working rig. I had heard that v4l2 doesn’t like to work after nvarguscamerasrc has been initialized, so I tried a fresh reboot with the nvargus-daemon disabled, and got the same results. Happy to help, just let me know what I can do. Thanks!