[Bug 1909882] Re: wanted to update ubuntu 18 to 20 every time is getting error

[Jouni Mettala]

main.log shows some obsolete packages. I have no idea about first one. It should be safe to remove these old linux-image packages.
Obsolete: hll2370dwpdrv:i386 linux-image-4.13.0-21-generic linux-image-extra-4.13.0-21-generic

apt.log shows 
Broken python-dev:amd64 Depends on python:amd64
Could you remove these development packages before upgrade? It should be safe. Still verify that necessary packages are not removed.
sudo apt remove python-dev python2-dev
Does it upgrade then?

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1909882

Title:
  wanted to update ubuntu 18 to 20 every time is getting error

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

Bug description:
  An unresolvable problem occurred while calculating the upgrade.

   If none of this applies, then please report this bug using the
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
  you want to investigate this yourself the log files in '/var/log/dist-
  upgrade' will contain details about the upgrade. Specifically, look at
  'main.log' and 'apt.log'.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.41
  ProcVersionSignature: Ubuntu 4.15.0-128.131-generic 4.15.18
  Uname: Linux 4.15.0-128-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.20
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Sat Jan  2 18:15:39 2021
  InstallationDate: Installed on 2017-06-16 (1296 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-01-02 (0 days ago)
  VarLogDistupgradeTermlog:

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