Please can you paste the output of the rpiboot command. in the failure case.
Remember to run it as 'sudo' or install the udev rule.
It would also be worth connecting a UART and/or HDMI to the CM4 to observe boot progress.
You also need to use a 5A power supply or set 'usb_max_current_enable=1' in config.txt, otherwise the Pi5 might not supply enough current to the CM4. A 3A supply for the Pi5 should be fine unless you are running a benchmark at the same time or have other power hungry USB device connected.
Please also check the Troubleshooting guide to see if anything is applicable in your setup
https://github.com/raspberrypi/usbboot/ ... leshooting
Remember to run it as 'sudo' or install the udev rule.
It would also be worth connecting a UART and/or HDMI to the CM4 to observe boot progress.
You also need to use a 5A power supply or set 'usb_max_current_enable=1' in config.txt, otherwise the Pi5 might not supply enough current to the CM4. A 3A supply for the Pi5 should be fine unless you are running a benchmark at the same time or have other power hungry USB device connected.
Please also check the Troubleshooting guide to see if anything is applicable in your setup
https://github.com/raspberrypi/usbboot/ ... leshooting
Statistics: Posted by timg236 — Wed May 14, 2025 8:56 pm