[Bug 1523103] [NEW] cannot upgrade from Xubuntu 14.04 to 15.04

[YS1]

Public bug reported:

do-release-upgrade asked me to file this bug.

I am under 14.04 LTS and want to upgrade to a non-LTS version. It seems
that the upgrade manager tries to upgrade from 14.04 to 15.04 because
14.10 is EOL, but then complains because 15.04 is not the next version
after 14.04.

If I run sudo DEBUG_UPDATE_MANAGER=1 /usr/bin/do-release-upgrade -d, it
tries to download thing about utopic (14.10) but fails due to 404
errors.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Sat Dec  5 14:45:51 2015
InstallationDate: Installed on 2014-07-18 (504 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2015-12-05 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update.manager.release.upgrades: 2015-12-05T14:29:56.871540

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty

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https://bugs.launchpad.net/bugs/1523103

Title:
  cannot upgrade from Xubuntu 14.04 to 15.04

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

Bug description:
  do-release-upgrade asked me to file this bug.

  I am under 14.04 LTS and want to upgrade to a non-LTS version. It
  seems that the upgrade manager tries to upgrade from 14.04 to 15.04
  because 14.10 is EOL, but then complains because 15.04 is not the next
  version after 14.04.

  If I run sudo DEBUG_UPDATE_MANAGER=1 /usr/bin/do-release-upgrade -d,
  it tries to download thing about utopic (14.10) but fails due to 404
  errors.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Sat Dec  5 14:45:51 2015
  InstallationDate: Installed on 2014-07-18 (504 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2015-12-05 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2015-12-05T14:29:56.871540

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