[Bug 2089293] Re: arm64 build failure for simple config

[Paul Mars]

** Changed in: ubuntu-image
       Status: New => Confirmed

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Title:
  arm64 build failure for simple config

Status in Ubuntu Image:
  Confirmed

Bug description:
  ```
  $ snap --version
  snap    2.65.3+24.04
  snapd   2.65.3+24.04
  series  16
  ubuntu  24.04
  kernel  6.8.0-49-generic
  ```

  for

  ```
  $ snap list ubuntu-image
  Name          Version  Rev  Tracking       Publisher   Notes
  ubuntu-image  3.4.1    981  latest/stable  canonical✓  classic
  ```

  
  When run

  ```
  $ sudo ubuntu-image classic --workdir work --debug arm.yaml
  ```

  eventually fails like this

  ```
  ...
  Processing triggers for initramfs-tools (0.142ubuntu25.4) ...
  update-initramfs: Generating /boot/initrd.img-6.8.0-49-generic
  /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
  Warning: root device  does not exist
  /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
  duration: 13m23.313277507s
  [7] prepare_image
  Fetching snapd (21761)
  duration: 7.927306422s
  [8] preseed_image
  ubuntu classic preseeding
  unmounting: /tmp/snapd-preseed
  error: cannot open snapd info file "/usr/lib/snapd/info": open /usr/lib/snapd/info: no such file or directory
  duration: 267.528413ms
  Error: Error running command "/usr/lib/snapd/snap-preseed work/chroot". Error: exit status 1. Output:
  ubuntu classic preseeding
  unmounting: /tmp/snapd-preseed
  error: cannot open snapd info file "/usr/lib/snapd/info": open /usr/lib/snapd/info: no such file or directory

  ```

  the `arm.yaml` is
  ```
  # Image metadata
  name: ubuntu-classical-arm64
  display-name: Ubuntu Classical Image for arm64
  revision: 1
  architecture: arm64
  series: noble
  class: preinstalled

  # Optional kernel (defaults to 'linux' if omitted)
  kernel: linux-image-generic

  # Gadget snap
  gadget:
    url: https://github.com/canonical/pc-gadget
    branch: classic
    type: git

  # Root filesystem definition
  rootfs:
    components:
      - main
    archive: ubuntu
    mirror: http://ports.ubuntu.com/ubuntu-ports/
    pocket: updates
    seed:
      urls:
        - git://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/
      names:
        - minimal
        - supported-hardware-common
      branch: noble
      vcs: true
    sources-list-deb822: true

  # Required dependency
  customization:
    extra-snaps:
      - name: snapd

  # Artifacts to generate
  artifacts:
    qcow2:
      - name: ubuntu-classical-arm64.img
    manifest:
      name: ubuntu-classical-arm64.manifest
  ```

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