Comment 24 for bug 1805668

For completeness I'll point out some problems with flash-kernel.... The 3B+ is not supported (bug 1764491), nor is the CM3 or new 3A+. Whenever a new revision of a board comes out it breaks.

The unforgiveable thing though is that the pi3 bootscript doesn't work (bug 1791466). This clearly has never been tested by those making the changes to the package. Ubuntu core doesn't use a bootscript with the pi3 which presumably is why this has never been picked up. The beta arm64 classic image contains a uboot.env (like ubuntu core), but this doesn't match what flash-kernel currently does for the pi3.

Finally, flash-kernel doesn't handle overlays which is a pretty big thing on the pi. For example, by default Ubuntu-core currently uses the vc4-fkms overlay.