[Bug 1850678] [NEW] flash-kernel only updates the dtb of the Pi it's on

[Dave Jones]

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

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to flash-kernel in Ubuntu.
https://bugs.launchpad.net/bugs/1850678

Title:
  flash-kernel only updates the dtb of the Pi it's on

Status in flash-kernel package in Ubuntu:
  New

Bug description:
  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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/flash-kernel/+bug/1850678/+subscriptions