[Bug 1535433] Re: Try to upgrade from 14.04 LTS to next version 15.04 (after switched from LTS to any new Version in the updater tool)

[Brian Murray]

*** This bug is a duplicate of bug 1534374 ***
    https://bugs.launchpad.net/bugs/1534374

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1534374, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** This bug has been marked a duplicate of bug 1534374
   unable to upgrade to 15.04 due to libstdc++6 SRU

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https://bugs.launchpad.net/bugs/1535433

Title:
  Try to upgrade from 14.04 LTS to next version 15.04 (after switched
  from LTS to any new Version in the updater tool)

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

Bug description:
  After I have switched from LTS (14.04) to update channel (any new
  version), I had clicked on upgrade (in the upgrader tool) to 15.04
  (after a restart).

  The upgrader tool check for new software and tried to set new software
  channels in a second step. During this the error message raised. The
  Upgrade failed and my system were set back to 14.04.

  
  Additional:

  Under /etc/apt/ the updater process had added new sources.lists (after
  the roll back as sources.list.distUpgrade) for the dist-upgrade and
  for my comprehension they seem correct.

  
  Details:

  Description:    Ubuntu 14.04.3 LTS
  Release:        14.04

  
  Hope this helps to locate the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
  Uname: Linux 3.13.0-74-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Jan 18 21:03:38 2016
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-18 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-15T10:21:24.008473

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