[Bug 2065229] Re: Upgrades to 24.04 LTS should be temporarily prevented for TPM FDE systems

[Nick Rosbrook]

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/2065229

Title:
  Upgrades to 24.04 LTS should be temporarily prevented for TPM FDE
  systems

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

Bug description:
  [Impact]
  It is not currently supported to upgrade desktop systems installed with TPM-backed FDE, so we should not allow such upgrades to start. We should notify the user of this and abort the upgrade.

  [Test Plan]

  Attempt an upgrade from 23.10 to 24.04 LTS on various types of Ubuntu
  installs:

  1. Desktop with TPM FDE
  2. Desktop classic
  3. LXD Container

  In case (1), the upgrade should be aborted with an appropriate message
  to the user. In cases (2) and (3), the upgrade should proceed as
  normally.

  [Where problems could occur]
  The test condition for determining that we are on Desktop with TPM FDE is checking that (a) pc-kernel snap is installed, and (b) ubuntu-desktop-minimal is installed. If the test condition is inadequate in some way, we would see bug reports about upgrades being blocked unnecessarily, or possibly users being allowed to upgrade despite running TPM FDE.

  As always with these kinds of quirks, if any package or snap names
  were spelled incorrectly, the quirk would not work correctly.

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