[Bug 1936401] [NEW] Migrate Pi users away from u-boot in impish

[Dave Jones]

Public bug reported:

Currently we have a different boot sequence on the Pi depending on which
release is used:

* Focal images (and prior) all use u-boot

* Groovy images (and onwards) don't

* However, upgraders from Focal to Groovy aren't forced off u-boot;
their boot configuration remains untouched

We should update user's boot configuration to migrate them off u-boot if
they're still on it prior to upgrade to impish. This should be added as
a quirk to do-release-upgrade. The primary complexity is that the Focal
boot configuration is split into three files which should be merged.
Logic from pibootctl's parser can be used for a lot of this.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
     Assignee: Dave Jones (waveform)
         Status: New

** Changed in: ubuntu-release-upgrader (Ubuntu)
     Assignee: (unassigned) => Dave Jones (waveform)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1936401

Title:
  Migrate Pi users away from u-boot in impish

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Currently we have a different boot sequence on the Pi depending on
  which release is used:

  * Focal images (and prior) all use u-boot

  * Groovy images (and onwards) don't

  * However, upgraders from Focal to Groovy aren't forced off u-boot;
  their boot configuration remains untouched

  We should update user's boot configuration to migrate them off u-boot
  if they're still on it prior to upgrade to impish. This should be
  added as a quirk to do-release-upgrade. The primary complexity is that
  the Focal boot configuration is split into three files which should be
  merged. Logic from pibootctl's parser can be used for a lot of this.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1936401/+subscriptions