[Bug 1970761] Re: Upgrades to 22.04 can cause netplan failures on Raspi

[Launchpad Bug Tracker]

This bug was fixed in the package ubuntu-release-upgrader - 1:22.04.11

---------------
ubuntu-release-upgrader (1:22.04.11) jammy; urgency=medium

  [ William 'jawn-smith' Wilson ]
  * DistUpgrade/DistUpgradeQuirks.py: Remove section of netplan
    config that is installed by default on Raspberry Pi and
    causes netplan failures after upgrade to jammy (LP: #1970761)

  [ Nick Rosbrook ]
  * DistUpgrade: Gracefully handle missing dbus module (LP: #1965568).
  * DistUpgrade: Do not show lock screen error if XDG_SESSION_TYPE is
    tty (LP: #1973785).
  * DistUpgrade: Add deb2snap entry for snapd-desktop-integration (LP: #1975747).
  * Run pre-build.sh: updating mirrors, demotions, and translations.

 -- Nick Rosbrook <nick.rosbrook at canonical.com>  Thu, 26 May 2022
10:49:26 -0400

** Changed in: ubuntu-release-upgrader (Ubuntu Jammy)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1970761

Title:
  Upgrades to 22.04 can cause netplan failures on Raspi

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed
Status in ubuntu-release-upgrader source package in Jammy:
  Fix Released

Bug description:
  [Impact]
      * In Jammy, Netplan commands fail if the following
        lines are present in the netplan config file:
        ```
        match:
           driver: bcmgenet smsc95xx lan78xx
        ```
      * Those lines are present in the default netplan config
        for Raspberry Pis in focal, hirsute, and impish
      * As a result, upgrades to jammy from older releases
        lead to netplan failures and broken networking

  [Test Plan]
      * Install impish on a Raspberry Pi
      * Upgrade to jammy using `do-release-upgrade -d`
      * Run `sudo netplan apply` and observe the command
        fails and the networking does not work
      * Reinstall impish on the Raspberry Pi
      * Upgrade to jammy using `do-release upgrade -d` with
        the proposed pocket enabled
      * Run `sudo netplan apply` and observe that the
        command succeeds and networking is functional

  [Regression Potential]
      * Since ubuntu-release-upgrader is modifying
        netplan's config, it is possible that custom
        configs could be impacted where not intended.

  [Original Description]
  The default netplan yaml configuration file on Raspi for older releases is

  ```
  network:
      ethernets:
          eth0:
              dhcp4: true
              match:
                  driver: bcmgenet smsc95xx lan78xx
              optional: true
              set-name: eth0
      version: 2
  ```

  In the version of netplan in jammy, the match section is no longer
  needed and causes netplan failures due to incompatible formatting. A
  quirk should be made to remove the match section.

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