Device tree in gadget.yaml

[rodmaz]

We are having difficulties getting this image to run on Raspberry Pi 3 B. We haven't narrowed down the issue completely but something has caught our attention. Why does the gadget.yaml is referencing an old device tree (bcm2709-rpi-3-b-plus)?
We expected to see a valid device tree in gadget.yaml, as defined here.

[RuhanSA079]

@rodmaz I tracked down the issue to the kernel being pulled from the internet with the bug in the linux-raspi2 package, you can try specifying a kernel file in the model file, and getting the pi-kernel snap file from the official Ubuntu Core image (extracted, kpartx mount), and provide the snap file with --snap as a parameter of ubuntu-image.

As for the gadget, I think you just substitute the dtb name in the device tree.
bcm2709-rpi-2-b: Pi 2B
bcm2710-rpi-3-b: Pi 3B
bcm2710-rpi-3-b-plus: Pi 3B+ and 3A+
bcm2710-rpi-cm3: Compute Module 3

I compiled the gadget with the bcm2710-rpi-3-b-plus device tree, and it was booting on a CM3+. (No idea why)
I will change that to the cm3 dtb and build/flash.

[Meulengracht]

If this issue still persists, can you retry with latest pi-kernel and see if this still is an issue? The DTB is now updated when the kernel is updated.