[Bug 1990061] [NEW] Errors while updating fresh Ubuntu 20.04 to Ubuntu 22.04 on a VDS

[Egor Suvorov]

Public bug reported:

I've just got a fresh VDS with Ubuntu 20.04.1 LTS (they system may be
modified by the hoster, though). I then set up SSH server, `sudo apt
update && sudo apt upgrade` followed by `sudo do-dist-upgrade`.
Unfortunately, the upgrade had some errors:

```
Errors were encountered while processing:
 udev
 initramfs-tools-core
 initramfs-tools
 plymouth
 plymouth-theme-ubuntu-text
 grub-common
 os-prober
 grub2-common
 grub-pc-bin
 grub-pc
Exception during pm.DoInstall():  E:Sub-process /usr/bin/dpkg returned an error code (1)

Could not install the upgrades

The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug in a browser at
http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug
and attach the files in /var/log/dist-upgrade/ to the bug report.
E:Sub-process /usr/bin/dpkg returned an error code (1)

...

Upgrade complete

The upgrade has completed but there were errors during the upgrade
process.

To continue please press [ENTER]
```

Nonetheless, it seems that the upgrade was completed, `lsb_release -rd`
is now 22.04. However, `sudo reboot` printed:

```
Failed to open initctl fifo: No such device or address
Failed to talk to init daemon.
```

I hard-rebooted the server and now `sudo reboot` works as expected.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "var-log-dist-upgrade.tgz"
   https://bugs.launchpad.net/bugs/1990061/+attachment/5616769/+files/var-log-dist-upgrade.tgz

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https://bugs.launchpad.net/bugs/1990061

Title:
  Errors while updating fresh Ubuntu 20.04 to Ubuntu 22.04 on a VDS

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

Bug description:
  I've just got a fresh VDS with Ubuntu 20.04.1 LTS (they system may be
  modified by the hoster, though). I then set up SSH server, `sudo apt
  update && sudo apt upgrade` followed by `sudo do-dist-upgrade`.
  Unfortunately, the upgrade had some errors:

  ```
  Errors were encountered while processing:
   udev
   initramfs-tools-core
   initramfs-tools
   plymouth
   plymouth-theme-ubuntu-text
   grub-common
   os-prober
   grub2-common
   grub-pc-bin
   grub-pc
  Exception during pm.DoInstall():  E:Sub-process /usr/bin/dpkg returned an error code (1)

  Could not install the upgrades

  The upgrade has aborted. Your system could be in an unusable state. A
  recovery will run now (dpkg --configure -a).

  Please report this bug in a browser at
  http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug
  and attach the files in /var/log/dist-upgrade/ to the bug report.
  E:Sub-process /usr/bin/dpkg returned an error code (1)

  ...

  Upgrade complete

  The upgrade has completed but there were errors during the upgrade
  process.

  To continue please press [ENTER]
  ```

  Nonetheless, it seems that the upgrade was completed, `lsb_release
  -rd` is now 22.04. However, `sudo reboot` printed:

  ```
  Failed to open initctl fifo: No such device or address
  Failed to talk to init daemon.
  ```

  I hard-rebooted the server and now `sudo reboot` works as expected.

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