[Bug 1715378] [NEW] Upgrade from 16.06 to 17.04 was unable to upgrade unity-desktop

[Kenny Stephens]

Public bug reported:

While "Preparing to upgrade" from 16.04 to 17.04, the update manager
reported that it could not upgrade unity-desktop. It claimed I had
changed /etc/update-manager/release-upgrades. I have not manually
altered that file.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.22
ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79
Uname: Linux 4.4.0-93-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Wed Sep  6 06:36:24 2017
InstallationDate: Installed on 2016-06-01 (461 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2017-09-06 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update-manager.release-upgrades: 2017-09-05T14:42:54.033549

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


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

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https://bugs.launchpad.net/bugs/1715378

Title:
  Upgrade from 16.06 to 17.04 was unable to upgrade unity-desktop

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

Bug description:
  While "Preparing to upgrade" from 16.04 to 17.04, the update manager
  reported that it could not upgrade unity-desktop. It claimed I had
  changed /etc/update-manager/release-upgrades. I have not manually
  altered that file.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.22
  ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79
  Uname: Linux 4.4.0-93-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Sep  6 06:36:24 2017
  InstallationDate: Installed on 2016-06-01 (461 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2017-09-06 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2017-09-05T14:42:54.033549

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