[Bug 1806199] [NEW] cannot upgrade from 16.04 to 18.04

[Mayank]

Public bug reported:

Not able to upgrade my 16.04 lt version to 18.04.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.26
ProcVersionSignature: Ubuntu 4.4.0-139.165-generic 4.4.160
Uname: Linux 4.4.0-139-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Dec  1 12:09:13 2018
InstallationDate: Installed on 2017-04-09 (601 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-12-01 (0 days ago)
VarLogDistupgradeTermlog:

** 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/1806199

Title:
  cannot upgrade from 16.04 to 18.04

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

Bug description:
  Not able to upgrade my 16.04 lt version to 18.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.26
  ProcVersionSignature: Ubuntu 4.4.0-139.165-generic 4.4.160
  Uname: Linux 4.4.0-139-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Dec  1 12:09:13 2018
  InstallationDate: Installed on 2017-04-09 (601 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-12-01 (0 days ago)
  VarLogDistupgradeTermlog:

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