Board description The Raspberry Pi 4 Model B is the probably most popular board of the Raspberry Pi family. [raspberry-pi-4-labelled@2x-1c8c2d74ade597b9c9c7e9e2fff16dd4] URL: https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ Wiki: https://elinux.org/RPi_Hub Test results Raspberry Pi …

Thanks for the details. @lluiscampos do you have any thoughts on this?

Sorry @ikkysleepy but I don’t know what the issue might be neither. Tomorrow I am going to the office so I’ll give it a try with a freshly build image, but at this point is really hard to guess what can be wrong with your setup (if anything is wrong).

@lluiscampos It looks like I’m hitting a similar problem to the one @ikkysleepy described.To my knowledge, I followed the procedure on this page, specifying BRANCH as ‘dunfell’. I’m using a Raspberry PI 4b with 8 GB of RAM. I verified I can flash a Raspbian OS image, and that boots, with serial outp…

@mikeb @ikkysleepy Actually, I have been able to reproduce it today in the office and I am investigating further as we speak… Thanks for reporting! I’ll keep you posted.

@lluiscampos Thank you. Out of curiosity, does your raspberry pi 4b have 8 GB of RAM? I know that the Raspbian based bootloader required an update to handle the newer model with more memory. But if yours has less, then of course, that would suggest this is a different issue.

Hi again, Just as a heads-up: I was not able to figure it out today and I will be offline for 5 days now. I hope to have time to look into this more next week.

@lluiscampos Thank you for the update. FWIW, I just built a stock raspberry pi 4 image with dunfell, following this procedure: [image] Build your own Linux Image for the Raspberry Pi Ever wanted to say, that you’ve built your own Linux? After this article, you’ll be able to say so and hav…

@mikeb @ikkysleepy Hi again. Sorry I have been offline for few days. So after some closer debugging, the problem was quite obvious after all: we are missing setting ENABLE_UART in local.conf. See layer documentation here: meta-raspberrypi/extra-build-config.md at master · agherzan/meta-raspberrypi…

@lluiscampos Thank you for following up! I’m curious, does this imply that this BSP is expected to not output on HDMI, and only on the UART? For ex. the stock raspberry pi 4 yocto BSP I built outputted to HDMI by default.

@mikeb I am not sure, to be honest. This is a detail that I couldn’t figure out the reason for.

Raspberry Pi 4 Model B - Yocto 4.0 "kirkstone" and earlier

Board Integrations Yocto Project

maxhochlenertarnoldn July 12, 2024, 12:04pm 43

is there an update for scarthgap?

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Raspberry Pi 4 Model B - Yocto 4.0 "kirkstone" and earlier

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