[Bug 1969786] Re: Upgrade from 20.04 to 22.04 failed

[Nick Rosbrook]

Hi,

If your system is still in this state, can you run `apport-collect
1969786` so we can see the upgrade log files?

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https://bugs.launchpad.net/bugs/1969786

Title:
  Upgrade from 20.04 to 22.04 failed

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

Bug description:
  On focal 20.04  I executed the following commands:

  sudo apt-get update
  sudo apt-get upgrade -y
  sudo apt-get install update-manager-core -y
  sudo apt-get dist-upgrade -y
  sudo apt-get autoremove

  also I disabled 3rd party repositories (Google, FreeCad and some other) 
   in /etc/apt/sources.list.d/ 

  Checking the version I have
  uname -mrs
    > Linux 5.13.0-40-generic x86_64
  lsb_release -a
    >   No LSB modules are available.
         Distributor ID:    Ubuntu
         Description:    Ubuntu 20.04.4 LTS
         Release:    20.04
         Codename:    focal

  Then I run the following command to execute the distribution upgrade
  procedure

  sudo do-release-upgrade -d

    And deep down into the process  (95%)  I hit the following "bug" 
  ...
  Installing new version of config file /etc/xdg/autostart/org.gnome.Evolution-alarm-notify.desktop ...
  Processing triggers for dbus (1.12.20-2ubuntu4) ...
  Processing triggers for libc-bin (2.35-0ubuntu3) ...
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Calculating the changes

  Calculating the changes

  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/jammy", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeMain.py", line 241, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 2038, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 1992, in fullUpgrade
      if not self.calcDistUpgrade():
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 1101, in calcDistUpgrade
      if not self.cache.installTasks(self.tasks):
  AttributeError: 'DistUpgradeController' object has no attribute 'tasks'
  Error in sys.excepthook:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/problem_report.py", line 477, in add_to_existing
      self.write(f)
    File "/usr/lib/python3/dist-packages/problem_report.py", line 430, in write
      block = f.read(1048576)
    File "/usr/lib/python3.8/codecs.py", line 322, in decode
      (result, consumed) = self._buffer_decode(data, self.errors, final)
  UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte
  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/jammy", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeMain.py", line 241, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 2038, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 1992, in fullUpgrade
      if not self.calcDistUpgrade():
    File "/tmp/ubuntu-release-upgrader-ql9_ymmz/DistUpgrade/DistUpgradeController.py", line 1101, in calcDistUpgrade
      if not self.cache.installTasks(self.tasks):
  AttributeError: 'DistUpgradeController' object has no attribute 'tasks'

     I have to admit of this is really a but or if it is "self-made"
  that I broke the python installation myself as I see that is using
  python38 from my system.

    I haven' t rebooted the computer ... The computer is "functional" but many Apps (file browser, LibreOffice to mention 2) have disappeared. I am scared that if I reboot I am going to be left without notebook to work with.
    Any guidance to get out of this issue would be much appreciated. 

  Thank you for reading.

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