Mender-convert'ed image fails to boot, can't mount root

[mirzak]

I think it is best to verify with known working configurations, e.g

Raspberry Pi 4 Model B + Raspbian

Board description The speed and performance of the new Raspberry Pi 4 is a step up from earlier models. For the first time, we’ve built a complete desktop experience. Whether you’re editing documents, browsing the web with a bunch of tabs open, juggling spreadsheets or drafting a presentation, you’ll find the experience smooth and very recognisable — but on a smaller, more energy-efficient and much more cost-effective machine. [image] URL: https://www.raspberrypi.org/products/raspberry-pi-4-m…

And trace from there any customization you need to make.