email

Cyril Brulebois kindly provided me with Debian packages for the two kernels he built and I tested them as well. I can confirm that the one without the three patches still had the panic on power up and when a PCIe device is present. Otherwise it booted without difficulty. The kernel with three patches booted successfully on all tries both cold and warm with a PCIe/NVME installed. I was also able to mount partitions on the NVME driver and copy data off.

My hardware

CM4 with WiFi/BT, 8GG RAM and no eMMC.
(Official) I/O board
PCIe/NVME adapter card with Intel 670p SSD installed
32GB Samsung EVO Select SD card (boot device.)

Thanks to all who contributed to this fix.