Just as an addendum, the CM4 is showing up prior to RPIBoot pi@Section9:~/usbboot $ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 2109:2813 VIA Labs, Inc. VL813 Hub Bus 001 Device 003: ID 0a5c:2711 Broadcom Corp. BCM2711 Boot Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub This is after sudo ./rpiboot [sudo] password for pi: RPIBOOT: build-date Apr 30 2023 version 20221215~105525 21ba5119 Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Sending bootcode.bin Successful read 4 bytes Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Loading embedded: bootcode4.bin Second stage boot server Cannot open file config.txt Cannot open file pieeprom.sig Loading embedded: start4.elf File read: start4.elf Cannot open file fixup4.dat Second stage boot server done pi@Section9:~/usbboot $ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 2109:2813 VIA Labs, Inc. VL813 Hub Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I have tried 2 different RPI I/O boards and get the same result from running rpiboot pi@Section9:~/usbboot $ sudo ./rpiboot [sudo] password for pi: RPIBOOT: build-date Apr 30 2023 version 20221215~105525 21ba5119 Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Sending bootcode.bin Successful read 4 bytes Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Loading embedded: bootcode4.bin Second stage boot server Cannot open file config.txt Cannot open file pieeprom.sig Loading embedded: start4.elf File read: start4.elf Cannot open file fixup4.dat Second stage boot server done the CM4 does not show up as a USB MSD at all from Windows, or NIX DMESG shows the following 89.543462] usb 1-1.3: USB disconnect, device number 3 [ 91.216870] usb 1-1.3: new high-speed USB device number 5 using xhci_hcd [ 91.317486] usb 1-1.3: New USB device found, idVendor=0a5c, idProduct=2711, bcdDevice= 0.00 [ 91.317506] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=4 [ 91.317512] usb 1-1.3: Product: BCM2711 Boot [ 91.317516] usb 1-1.3: Manufacturer: Broadcom [ 91.317521] usb 1-1.3: SerialNumber: cab56164 [ 92.931013] usb 1-1.3: USB disconnect, device number 5 [ 105.684946] usb 1-1.3: new high-speed USB device number 6 using xhci_hcd [ 409.841791] v3d fec00000.v3d: MMU error from client CLE (4) at 0x4aa1000, pte invalid As usual with everyone else that has this issue, when booting the CM4 off a SD card it runs just dandy but when it comes to flashing it..... not so much

Correct, the issue is with my CM4

Thank you for your quick reply, Just got the carrier board and 5U case and cannot get the Interceptor O/S (or any O/S) flashed.... Every time i try rpiboot i get RPIBOOT: build-date Apr 30 2023 version 20221215~105525 21ba5119 Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Sending bootcode.bin Successful read 4 bytes Waiting for BCM2835/6/7/2711... Loading embedded: bootcode4.bin Loading embedded: bootcode4.bin Second stage boot server Cannot open file config.txt Cannot open file pieeprom.sig Loading embedded: start4.elf File read: start4.elf Cannot open file fixup4.dat and then it wont mount as a USB drive so i can flash the interceptor O/S so starting to think that i have a bad CM4 board