[Bug 1608267] [NEW] can't upgrade distribution 14.04 to 16.04

[Grzegorz Suwaj]

Public bug reported:

I restarted my system and it showed me that I can upgrade my Ubuntu. Now
I have 14.04, I'd like to have 16.04. I clicked on "yes" or something
like that, the upgrade took some process then I saw some message. It
says that I can't upgrade my Ubuntu, the problem may be that I have
"experimental" version, I'm trying to install "experimental" version or
I've some third-party packages installed. I don't think that one of this
three may be truth. That's why I'm asking.

Regards
Grzegorz Suwaj

Info:
Ubuntu 14.04.4 LTS
ubuntu-release-upgrader-core is ver. 1:0.220.8

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.16.0-77.99~14.04.1-generic 3.16.7-ckt27
Uname: Linux 3.16.0-77-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun Jul 31 20:18:08 2016
InstallationDate: Installed on 2016-03-06 (146 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-07-31 (0 days ago)
VarLogDistupgradeTermlog:

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


** Tags: amd64 apport-bug dist-upgrade trusty

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https://bugs.launchpad.net/bugs/1608267

Title:
  can't upgrade distribution 14.04 to 16.04

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

Bug description:
  I restarted my system and it showed me that I can upgrade my Ubuntu.
  Now I have 14.04, I'd like to have 16.04. I clicked on "yes" or
  something like that, the upgrade took some process then I saw some
  message. It says that I can't upgrade my Ubuntu, the problem may be
  that I have "experimental" version, I'm trying to install
  "experimental" version or I've some third-party packages installed. I
  don't think that one of this three may be truth. That's why I'm
  asking.

  Regards
  Grzegorz Suwaj

  Info:
  Ubuntu 14.04.4 LTS
  ubuntu-release-upgrader-core is ver. 1:0.220.8

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.16.0-77.99~14.04.1-generic 3.16.7-ckt27
  Uname: Linux 3.16.0-77-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sun Jul 31 20:18:08 2016
  InstallationDate: Installed on 2016-03-06 (146 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-07-31 (0 days ago)
  VarLogDistupgradeTermlog:

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