[Bug 1791014] Re: Upgrade from 16.04 to 18.04.1 fails

[Brian Murray]

You appear to be missing some packages from the ubuntu-minimal meta
package. Please run 'sudo apt-get install --reinstall ubuntu-minimal'
and after that try the upgrade again.

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

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https://bugs.launchpad.net/bugs/1791014

Title:
  Upgrade from 16.04 to 18.04.1 fails

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

Bug description:
  Reading cache

  Checking package manager
  Reading package lists... Done
  Building dependency tree        
  Reading state information... Done
  Hit http://at.archive.ubuntu.com/ubuntu xenial InRelease                                                                                                                                                                                           
  Hit http://at.archive.ubuntu.com/ubuntu xenial-updates InRelease                                                                                                                                                                                   
  Hit http://at.archive.ubuntu.com/ubuntu xenial-backports InRelease                                                                                                                                                                                 
  Hit http://security.ubuntu.com/ubuntu xenial-security InRelease                                                                                                                                                                                    
  Fetched 0 B in 0s (0 B/s)                                                                                                                                                                                                                          
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Updating repository information
  Hit http://at.archive.ubuntu.com/ubuntu bionic InRelease                                                                                                                                                                                           
  Hit http://at.archive.ubuntu.com/ubuntu bionic-updates InRelease                                                                                                                                                                                   
  Hit http://at.archive.ubuntu.com/ubuntu bionic-backports InRelease                                                                                                                                                                                 
  Hit http://security.ubuntu.com/ubuntu bionic-security InRelease                                                                                                                                                                                    
  Fetched 0 B in 0s (0 B/s)                                                                                                                                                                                                                          

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Calculating the changes

  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  * Running the current pre-release version of Ubuntu 
  * Unofficial software packages not provided by Ubuntu 

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  === Command detached from window (Thu Sep  6 08:49:41 2018) ===

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.15.0-33.36~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-33-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Sep  6 08:45:24 2018
  InstallationDate: Installed on 2017-08-02 (399 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-09-06 (0 days ago)

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