[Bug 2120177] Re: piboot needs to include watchdog in migration

[Launchpad Bug Tracker]

This bug was fixed in the package flash-kernel - 3.109ubuntu4

---------------
flash-kernel (3.109ubuntu4) questing; urgency=medium

  * Enable the hardware watchdog during migration of the boot configuration
    (LP: #2120177)
  * Report failure of new boot assets in motd (LP: #2119659)

 -- Dave Jones <dave.jones at canonical.com>  Fri, 08 Aug 2025 14:48:45
+0100

** Changed in: flash-kernel (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/2120177

Title:
  piboot needs to include watchdog in migration

Status in flash-kernel package in Ubuntu:
  Fix Released

Bug description:
  The A/B boot mechanism must enable the hardware watchdog in config.txt
  in order for the fallback mechanism to work automatically. This was
  missed in the initial implementation as the initial tests were done
  with a manual power-off, and later with a setup that happened to
  enable the hardware watchdog anyway.

  The migration routine that edits config.txt should append
  dtparam=watchdog=on to the final [all] section in the file. It must be
  added *after* the os_prefix lines (which the migration is already
  adding at the top). If there is no final [all] section, one must be
  added. If dtparam=watchdog=on is already present (in an "[all]"
  section) in the file, we should not duplicate it.

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