[Bug 2130734] Re: Warn upgraders of Pi 4 EEPROM requirements

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~waveform/ubuntu-release-upgrader/+git/ubuntu-release-upgrader/+merge/499962

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https://bugs.launchpad.net/bugs/2130734

Title:
  Warn upgraders of Pi 4 EEPROM requirements

Status in flash-kernel package in Ubuntu:
  Invalid
Status in ubuntu-release-upgrader package in Ubuntu:
  Triaged

Bug description:
  Users on the Pi 4 upgrading to questing (and the forthcoming resolute)
  should be warned if their boot EEPROM version is earlier than
  2022-11-25, as earlier EEPROMs cannot deal with the newer boot layout.

  This test is only necessary on the Pi 4; earlier models do not have a
  boot EEPROM, and the Pi 5's boot EEPROM was recent enough at release.
  A reasonable test would probably be to check for the 2711 CPU in
  /proc/cpuinfo, the presence of the rpi-eeprom-update script (which is
  seeded and should always be available on a Raspberry Pi install), and
  the bootloader timestamp extracted from the runtime device-tree.

  In the event the boot EEPROM is too old, u-r-u should simply abort the
  upgrade, and inform the user why. It must *not* attempt to force the
  EEPROM update itself.

  [ Original Description ]

  Get this error after upgrade to 25:10: piboot-try: New boot assets in
  /boot/firmware/new failed

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: flash-kernel 3.109ubuntu6
  ProcVersionSignature: Ubuntu 6.14.0-1017.17-raspi 6.14.11
  Uname: Linux 6.14.0-1017-raspi aarch64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: arm64
  CasperMD5CheckResult: unknown
  CloudArchitecture: aarch64
  CloudID: nocloud
  CloudName: unknown
  CloudPlatform: nocloud
  CloudSubPlatform: config-disk (/dev/mmcblk0p1)
  Date: Wed Nov  5 17:03:02 2025
  ImageMediaBuild: 20241007.1
  ProcEnviron:
   LANG=C.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: flash-kernel
  UpgradeStatus: Upgraded to questing on 2025-11-05 (0 days ago)

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