[Bug 1769576] Re: not able to upgrade from ubuntu 16.04 to 18

[Jean-Baptiste Lallement]

Thanks for yourt report.

The root cause of the issue is the Xorg stack installed from the padoka
PPA. Please revert these packages and try to upgrade again.

Don't hesitate to file any bug you may find.

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

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https://bugs.launchpad.net/bugs/1769576

Title:
  not able to upgrade from ubuntu 16.04 to 18

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

Bug description:
  I used this command to upgrade my ubuntu 16.04 to 18

  sudo do-release-upgrade -d

  
  then I got the following error 

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.13.0-39.44~16.04.1-generic 4.13.16
  Uname: Linux 4.13.0-39-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.1-0ubuntu2.16
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon May  7 12:32:09 2018
  InstallationDate: Installed on 2017-08-03 (276 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 2018-05-07 (0 days ago)

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