Public bug reported:
Ubuntu is not upgrading from 16.04 to 18.04 .
Even when i type sudo do-release-upgrade it is showing that no new
release found.
But when i type Alt+F2 and then update-manager -cd it is showing upgrade to
18.04 and then it is stopping at
3 rd step reporting that cannot calcualte packages
it is showing either ur system is in pre-release version like that.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Tue May 22 17:47:37 2018
InstallationDate: Installed on 2016-07-30 (661 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64
(20160421)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: Upgraded to xenial on 2018-05-22 (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/1772645
Title:
ubuntu is not upgrading from 16.04 LTS to 18.04 LTS
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