[Bug 1803036] Re: upgrade to 18.04 stops without errors

[Ayushya Chitransh]

The point at which upgrade stops is after hitting bionic-backports. Here
are the logs from screen:

Some third party entries in your sources.list were disabled. You can 
re-enable them after the upgrade with the 'software-properties' tool 
or your package manager. 

To continue please press [ENTER]

Hit http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu bionic InRelease                                                                        
Hit http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu bionic-security InRelease                                                               
Hit http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu bionic-updates InRelease                                                                
Hit http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu bionic-backports InRelease                                                              
Fetched 0 B in 0s (0 B/s)                                                                                                                            

Checking package manager
Reading package lists... Done  
Building dependency tree          
Reading state information... Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

This can be caused by: 
* Upgrading to a pre-release version of Ubuntu 
* Running the current pre-release version of Ubuntu 
* Unofficial software packages not provided by Ubuntu 

If none of this applies, then please report this bug using the 
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 


Restoring original system state

Aborting
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
=== Command detached from window (Tue Nov 13 10:33:09 2018) ===
=== Command terminated with exit status 1 (Tue Nov 13 10:33:19 2018) ===

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1803036

Title:
  upgrade to 18.04 stops without errors

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

Bug description:
  $ lsb_release -rd'
  Description:	Ubuntu 16.04.5 LTS
  Release:	16.04

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-138.164-generic 4.4.155
  Uname: Linux 4.4.0-138-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Nov 13 10:25:49 2018
  InstallationDate: Installed on 2017-02-11 (639 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-11-13 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1803036/+subscriptions