Raspberry Pi 3 Model B/B+

I’m using kirkstone and I’m just getting started with Mender on RaspberryPi 3 Model B, and I’ve run into a problem that the device will not boot when meta-mender-raspberrypi is added and ENABLE_UART=“1” is NOT set. It boots fine if ENABLE_UART=“1” is added.

AFAIK, the only change this mades to the boot partition is to add console=serial0,115200 to the cmdline.txt and enable_uart=1 to config.txt.

I’ve started going down a rabbit hole of suggestions. It sounds like Mender’s changes to u-boot may have regressed it such that it balks at the DTB when UART is not enabled, but this is way over my head.

Any suggestions? I can progress with learning for now with UART enabled but at some point I’d like to be able to turn it off.