[Bug 1735961] Re: Cannot upgrade ubuntu mate 16.04

[Luke Brumfield]

I did have a set of packages held back, I unheld them and the upgrade is
working properly. A message for something that simple might be easy to
integrate into the warning messages.

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https://bugs.launchpad.net/bugs/1735961

Title:
  Cannot upgrade ubuntu mate 16.04

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

Bug description:
  Cannot upgrade to 17.04, 17.10, or 18.04 all give the same message.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.23
  ProcVersionSignature: Ubuntu 4.10.0-40.44~16.04.1-generic 4.10.17
  Uname: Linux 4.10.0-40-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.13
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Sat Dec  2 23:54:11 2017
  InstallationDate: Installed on 2017-11-07 (26 days ago)
  InstallationMedia: Ubuntu-MATE 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2017-12-03 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2017-12-02T23:47:58.280148

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