Building HAOS image with Serial Port Support

Hello all,

I have been trying to install Home Assistant OS on my APU.3C4-based PC (PC Engines apu3c4 product file). Note the board has no graphics card port. I managed to write the downloaded 8.4 release image to its disk. I would like to use its serial port so I can control the machine from my laptop, but I am not getting anything on the port that is connected to my laptop running Debian GNU/Linux (the stable Bullseye release). Because of that, I don’t know what is going on when I boot from SSD that has the image written over it.

How do I make HAOS to give something on the serial port? I believe I should change the kernel arguments to include console=ttyS0,115200n8 as that has worked for other OSes I installed on the machine. However, I do not know how to do that with the officially released 8.4 image.

What I attempted is to build a generic_x86_64 HAOS image by cloning, checking out the 8.4 tag, then modifying ./buildroot-external/board/pc/generic-x86-64/cmdline.txt to read console=ttyS0,115200n8, and finally running sudo scripts/ make generic_x86_64. Unfortunately, this results in the following error:

1bdfc9a49750: Pull complete
b6227924db50: Pull complete
Digest: sha256:f8c65c9a3ecaa40c8f6e90e67c23c79c4dd6a2bee646a8c7c71bf9e49bea4eae
Status: Downloaded newer image for docker:20.10-dind
Waiting for Docker daemon...
Loading containers...
Loaded image:
open /var/lib/docker/tmp/docker-import-1908728770/repositories: no such file or directory
make[1]: *** [package/ /build/output/build/hassio-1.0.0/.stamp_images_installed] Error 1
make[1]: Leaving directory '/build/buildroot'
make: *** [Makefile:39: generic_x86_64] Error 2

What do I do to resolve this image build issue, or more generally - how to get the serial port working for HAOS?

Hi @mdimjasevic ,

can’t help you with the error directly. But I want to do the same. I think we have to add serial console support in kernel as well:

I’ve changed the kernel config: buildroot-external/board/pc/generic-x86-64/kernel.config


Then I’ve run scripts/ make generic_x86_64-config and afterwards scripts/ make generic_x86_64. Now it’s compiling for an hour already.

This didn’t work for me. I think there has to be modified more for the apu.