[Bug 1509297] Re: upgrade from 15.04 to 15.10 failed

[Launchpad Bug Tracker]

*** This bug is a duplicate of bug 996916 ***
    https://bugs.launchpad.net/bugs/996916

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/1509297

Title:
  upgrade from 15.04 to 15.10 failed

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

Bug description:
  Upgrade 15.04 -> 15.10 via command line didn't work. I don't think any
  of the conditions mentioned apply to my case.

  
  Part of log:

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubuntu-release-upgrader-core 1:15.04.14.2
  ProcVersionSignature: Ubuntu 3.19.0-31.36-generic 3.19.8-ckt7
  Uname: Linux 3.19.0-31-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri Oct 23 12:28:59 2015
  InstallationDate: Installed on 2013-05-17 (888 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to vivid on 2015-10-23 (0 days ago)

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