Rock PI 4B V1.4 does not boot when NVMe SSD is connected

#1

Dear Guys,
I have following configuration:

Rock PI 4B 4GB v1.4
Rock PI 4x - M.2 Extension board v1.4
ACER M.2 NVMe SSD for Rock Pi4 - 1TB

I have successfully installed the u-boot image to SPI flash following the Method Two: Write image to SPI flash using mtd tool.
I can boot from µSD without problems as long as the NVMe SSD is not connected.
I can access the SSD when connected via an USB adapter.
When I connect the SSD to the extension board, the green LED is on, the blue one stays dark.
The same is when I connect the SSD directly to the Rock PI 4 board.
Any glue what is wrong?
Thanks!
Herwig

#2

How was formatted your NVMe?
There is possibility, that uboot in spi looks for boot sequence on nvme, found something similar to what he expect and hangs there

#3

I installed the ubuntu 18.04 server image with Etcher and dd, and I tried with ext4 on the empty drive.
But the system neither starts from µSD nor from something else when the SSD is connected, even if there is a system on the SSD or not …

#4

Did you ever solve this? Facing the same problem here on a Rock 5B.