[Bug 1916805] Re: 18.04 to 20.04 upgrade failure

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

I don't see the Launchpad question you refer to, if I did, I would have
looked up what you asked there and possibly made a comment.

I do see refer to Qt4 requirements, Qt5 was introduced in Dec-2012 and
programs that used Qt4 needed to port to Qt5, with Qt4 being removed
from Debian & Ubuntu in 2019 (thus requirements don't exist in
focal/20.04 or will again).

I would see what you have that depends on `libphonon4` (Qt4) as that can
longer longer be met with focal/20.04 using Qt5 only in Ubuntu
repositories.  This however I see as a support issue/question (and I
didn't find your launchpad question).

This may not be your only issue..

I suspect a Support site would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://ubuntuforums.org, or for more support options please look at
https://discourse.ubuntu.com/t/community-support/709

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https://bugs.launchpad.net/bugs/1916805

Title:
  18.04 to 20.04 upgrade failure

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

Bug description:
  A question in Nov 2020 appeared in
  http://answers.launchpad.net/ubuntu/ :

  694046  not able to upgrade to 20.04 fm 18.04 Could not calculate the
  upgrade An unresolvable problem occurred while calculating the
  upgrade.

  I have the same problem for months now. His question was not resolved.
  Hope the bug is fixed because in April 2023, 18.04 will be obsolete.
  Might need to buy a new computer and OS.

  Both of us may not the most computer literate. Or haven't been
  answered.

  Thank you.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-136.140-generic 4.15.18
  Uname: Linux 4.15.0-136-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Thu Feb 25 09:19:08 2021
  InstallationDate: Installed on 2018-09-01 (907 days ago)
  InstallationMedia: Computerbank 18.04 - Release amd64
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-02-24 (0 days ago)
  VarLogDistupgradeTermlog:

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