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C779
,A1:
* 1. Please use monitor to test, DO NOT use VNC.(Customer Feedback: During the VNC it spend some of gpu and there is not enough for camera.Based on RPi 4 + Hawkeye Firefly Mini)
* 2. First the HDMI device should be plugged in and have signal output before the Raspberry Pi is started.
* 3. Please check if there is a video related file in the /dev file.