Ubuntu Server Upgrade 18.04 to 20.04

[Collin Nyemetz]

Ubuntu Server Upgrade from 18.04 to 20.04 does not complete successfully and gives "an unresolvable problem occurred while calculating the upgrade" error message.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.44
ProcVersionSignature: Ubuntu 5.4.0-1047.49~18.04.1-azure 5.4.106
Uname: Linux 5.4.0-1047-azure x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
Date: Wed May 12 17:41:03 2021
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-05-12 (0 days ago)
VarLogDistupgradeLspcitxt:
 00:00.0 Host bridge [0600]: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (AGP disabled) [8086:7192] (rev 03)
 00:07.0 ISA bridge [0601]: Intel Corporation 82371AB/EB/MB PIIX4 ISA [8086:7110] (rev 01)
 00:07.1 IDE interface [0101]: Intel Corporation 82371AB/EB/MB PIIX4 IDE [8086:7111] (rev 01)
 00:07.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI [8086:7113] (rev 02)
 00:08.0 VGA compatible controller [0300]: Microsoft Corporation Hyper-V virtual VGA [1414:5353]

[Brian Murray (brian-murray)]

Thanks for taking the time to report this upgrade failure. There is currently a new version of the release upgrader available in -proposed which may resolve the error you've encountered. Please run the following command to test the new version of the upgrader:

  do-release-upgrade -p

Please lets us know the results in this bug report. Thanks again and good luck!

[Collin Nyemetz (cnyemetz)]

This command worked. I was successfully able to upgrade from 18.04 to 20.04.2. I also want to note that the error I reported was on a completely fresh install of Ubuntu 18.04.