[Bug 1852006] Re: Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade.

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1852006

Title:
  Could not calculate the upgrade  An unresolvable problem occurred
  while calculating the upgrade.

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

Bug description:
  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  Removed other PPAs in "Other Software" in Software & Updates

  How do I find out which package I need to remove?

  
  From main.log

  2019-11-10 11:28:25,855 DEBUG entry 'deb http://security.ubuntu.com/ubuntu disco-security universe' updated to new dist
  2019-11-10 11:28:25,855 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu bionic-security multiverse'
  2019-11-10 11:28:25,855 DEBUG entry 'deb http://security.ubuntu.com/ubuntu disco-security multiverse' updated to new dist
  2019-11-10 11:28:25,858 DEBUG running doUpdate() (showErrors=True)
  2019-11-10 11:28:51,559 DEBUG openCache()
  2019-11-10 11:28:52,174 DEBUG /openCache(), new cache size 95639
  2019-11-10 11:28:52,174 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
  2019-11-10 11:29:02,759 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
  2019-11-10 11:29:02,761 DEBUG abort called
  2019-11-10 11:29:02,763 DEBUG openCache()
  2019-11-10 11:29:05,143 DEBUG /openCache(), new cache size 94778

  
  From apt.log

  Broken snmp:amd64 Depends on libsnmp30:amd64 < 5.7.3+dfsg-1.8ubuntu3.3 | 5.7.3+dfsg-5ubuntu1.2 @ii umH > (= 5.7.3+dfsg-5ubuntu1.2)
    Considering libsnmp30:amd64 13 as a solution to snmp:amd64 1
    MarkKeep snmp:amd64 < 5.7.3+dfsg-1.8ubuntu3.3 -> 5.7.3+dfsg-5ubuntu1.2 @ii umU Ib > FU=0
    Holding Back snmp:amd64 rather than change libsnmp30:amd64

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.34
  ProcVersionSignature: Ubuntu 5.0.0-32.34~18.04.2-generic 5.0.21
  Uname: Linux 5.0.0-32-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Nov 10 11:08:54 2019
  InstallationDate: Installed on 2019-05-26 (168 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2019-11-10 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2019-10-25T19:22:11.427009

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