Hi,
I was able to fix the problem with disable-bt overlay:
- I forked the mender-uboot and applied the patch mentioned here
- I patched integration-scripts to create the binaries
- I run mender-convert using the patched binaries
Everything is now running nice and smoothly and i can use ttyAMA0.
I think it would make sense to offer that patched version of mender-uboot binaries for a “new” device type (raspberrypi3serial) and by assigning RASPBERRYPI_CONFIG=“raspberrypi3serial” those binaries would then be used when running mender convert. the raspberrypi_config.)