[Bug 1874900] [NEW] Can't Upgrade from 16.04 to 18.04, no details in error message

Jonathan Jiang jonathanjiang at gmail.com
Fri Apr 24 20:11:08 UTC 2020


Public bug reported:

I am upgrading from 16.04 to 18.04. I removed all non-ubuntu packages
because that cause complaints at first.

Now there is an error, but it doesn't specify why it is failing.

I only get:
"
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 16.04
Package: ubuntu-release-upgrader-core 1:16.04.29
ProcVersionSignature: Ubuntu 4.15.0-96.97~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-96-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Fri Apr 24 13:05:15 2020
InstallationDate: Installed on 2016-09-12 (1320 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2020-04-24 (0 days ago)

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


** Tags: amd64 apport-bug dist-upgrade xenial

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https://bugs.launchpad.net/bugs/1874900

Title:
  Can't Upgrade from 16.04 to 18.04, no details in error message

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

Bug description:
  I am upgrading from 16.04 to 18.04. I removed all non-ubuntu packages
  because that cause complaints at first.

  Now there is an error, but it doesn't specify why it is failing.

  I only get:
  "
  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 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.29
  ProcVersionSignature: Ubuntu 4.15.0-96.97~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-96-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Apr 24 13:05:15 2020
  InstallationDate: Installed on 2016-09-12 (1320 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2020-04-24 (0 days ago)

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