Public bug reported:
Specific to the Raspberry Pi, when flash-kernel is executed to copy
things to the boot partition, only the dtb of the Pi that it is being
executed on is copied. In order to support moving the SD card between Pi
models, flash-kernel needs to copy *all* dtbs provided by the kernel to
the boot partition.
Consider the case of SRUing Pi 4 support to Bionic. Bionic does not
currently support the Pi 4, so a user must necessarily boot their Bionic
image on, say, a Pi 3. If they then upgrade to a kernel supporting the
Pi 4, flash-kernel will only copy the dtb for the Pi 3 to the boot
partition. If the card is then moved to a Pi 4 it will fail to boot due
to a missing device-tree.
** Affects: flash-kernel (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1850678
Title:
flash-kernel only updates the dtb of the Pi it's on
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