Cannot upgrade from 16.04 to 18.04

[Ziqing Hong]

sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,246 kB]
Fetched 1,247 kB in 0s (0 B/s)
authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg'
extracting 'bionic.tar.gz'

Reading cache

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit http://us.archive.ubuntu.com/ubuntu xenial InRelease
Hit http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease
Fetched 0 B in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done

Updating repository information
Hit http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit http://security.ubuntu.com/ubuntu bionic-security 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.

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.

Restoring original system state

Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.26
ProcVersionSignature: Ubuntu 4.4.0-142.168-generic 4.4.167
Uname: Linux 4.4.0-142-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun Feb 17 17:53:20 2019
InstallationDate: Installed on 2015-01-12 (1497 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2019-02-17 (0 days ago)

[Brian Murray (brian-murray)]

You seem to have vim installed from a PPA on Ubuntu 16.04 which is causing the failure to calculate the upgrade. Please install vim from the official Ubuntu archive and then try the upgrade again.

[Ziqing Hong (zqhong)]

Awesome! That fixed it! Thank you!

---------------------

Best Regards,

Ziqing

On 2/18/19 2:38 AM, Brian Murray wrote:
> You seem to have vim installed from a PPA on Ubuntu 16.04 which is
> causing the failure to calculate the upgrade. Please install vim from
> the official Ubuntu archive and then try the upgrade again.
>
> ** Changed in: ubuntu-release-upgrader (Ubuntu)
> Status: New => Incomplete
>

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]