[Bug 1924951] Re: Cannot upgrade from 18.04 to 20.04 "An unresolvable problem occured while calculating the upgrade."

Fri May 21 04:38:19 UTC 2021

Hi Brian,

I just tried it, but it seems to have the same issue:

admin at jv:/home/jochen$ do-release-upgrade -p
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1,554 B]                                                                                                                     
Get:2 Upgrade tool [1,349 kB]                                                                                                                              
Fetched 1,350 kB in 0s (0 B/s)                                                                                                                             
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
extracting 'focal.tar.gz'
[sudo] password for admin: 

To continue please press [ENTER]

Get:1 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal/main i386 Packages [718 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages [970 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/main Translation-en [506 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/main amd64 DEP-11 Metadata [494 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal/main DEP-11 48x48 Icons [98.4 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal/main DEP-11 64x64 Icons [163 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal/main amd64 c-n-f Metadata [29.5 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages [8,628 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal/universe i386 Packages [4,642 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal/universe Translation-en [5,124 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal/universe amd64 DEP-11 Metadata [3,603 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/universe DEP-11 48x48 Icons [3,016 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/universe DEP-11 64x64 Icons [7,794 kB]
Get:18 http://archive.ubuntu.com/ubuntu focal/universe amd64 c-n-f Metadata [265 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal-updates/main i386 Packages [480 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages [988 kB]
Get:21 http://archive.ubuntu.com/ubuntu focal-updates/main Translation-en [224 kB]
Get:22 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [264 kB]
Get:23 http://archive.ubuntu.com/ubuntu focal-updates/main DEP-11 48x48 Icons [55.6 kB]
Get:24 http://archive.ubuntu.com/ubuntu focal-updates/main DEP-11 64x64 Icons [87.9 kB]
Get:25 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 c-n-f Metadata [13.4 kB]
Get:26 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [777 kB]
Get:27 http://archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages [574 kB]
Get:28 http://archive.ubuntu.com/ubuntu focal-updates/universe Translation-en [167 kB]
Get:29 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [323 kB]
Get:30 http://archive.ubuntu.com/ubuntu focal-updates/universe DEP-11 48x48 Icons [204 kB]
Get:31 http://archive.ubuntu.com/ubuntu focal-updates/universe DEP-11 64x64 Icons [362 kB]
Get:32 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 c-n-f Metadata [17.5 kB]
Get:33 http://archive.ubuntu.com/ubuntu focal-backports/main amd64 c-n-f Metadata [112 B]
Get:34 http://archive.ubuntu.com/ubuntu focal-backports/universe i386 Packages [2,932 B]
Get:35 http://archive.ubuntu.com/ubuntu focal-backports/universe amd64 Packages [4,032 B]
Get:36 http://archive.ubuntu.com/ubuntu focal-backports/universe Translation-en [1,448 B]
Get:37 http://archive.ubuntu.com/ubuntu focal-backports/universe amd64 DEP-11 Metadata [1,764 B]
Get:38 http://archive.ubuntu.com/ubuntu focal-backports/universe DEP-11 48x48 Icons [2,809 B]
Get:39 http://archive.ubuntu.com/ubuntu focal-backports/universe DEP-11 64x64 Icons [3,944 B]
Get:40 http://archive.ubuntu.com/ubuntu focal-backports/universe amd64 c-n-f Metadata [224 B]
Get:41 http://archive.ubuntu.com/ubuntu focal-security/main amd64 Packages [664 kB]
Get:42 http://archive.ubuntu.com/ubuntu focal-security/main i386 Packages [237 kB]
Get:43 http://archive.ubuntu.com/ubuntu focal-security/main Translation-en [134 kB]
Get:44 http://archive.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [24.4 kB]
Get:45 http://archive.ubuntu.com/ubuntu focal-security/main DEP-11 48x48 Icons [11.0 kB]
Get:46 http://archive.ubuntu.com/ubuntu focal-security/main DEP-11 64x64 Icons [16.5 kB]
Get:47 http://archive.ubuntu.com/ubuntu focal-security/main amd64 c-n-f Metadata [7,668 B]
Get:48 http://archive.ubuntu.com/ubuntu focal-security/universe amd64 Packages [578 kB]
Get:49 http://archive.ubuntu.com/ubuntu focal-security/universe i386 Packages [457 kB]
Get:50 http://archive.ubuntu.com/ubuntu focal-security/universe Translation-en [90.1 kB]
Get:51 http://archive.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [58.3 kB]
Get:52 http://archive.ubuntu.com/ubuntu focal-security/universe DEP-11 48x48 Icons [26.7 kB]
Get:53 http://archive.ubuntu.com/ubuntu focal-security/universe DEP-11 64x64 Icons [46.0 kB]
Get:54 http://archive.ubuntu.com/ubuntu focal-security/universe amd64 c-n-f Metadata [11.3 kB]
Fetched 43.6 MB in 6s (344 kB/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 was likely caused by:
* Unofficial software packages not provided by Ubuntu
Please use the tool 'ppa-purge' from the ppa-purge
package to remove software from a Launchpad PPA and
try the upgrade again.

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
=== Command terminated with exit status 1 (Fri May 21 12:27:01 2021) ===

The contents of the log folder:

admin at jv:/var/log/dist-upgrade/20210521-1221$ ll
total 12
drwxr-xr-x  2 root root 4096 May 21 12:21 ./
drwxr-xr-x 27 root root 4096 May 21 12:24 ../
-rw-r--r--  1 root root  824 May 21 12:21 main.log
admin at jv:/var/log/dist-upgrade/20210521-1221$ more main.log 
2021-05-21 12:21:08,299 INFO Using config files '['./DistUpgrade.cfg.bionic']'
2021-05-21 12:21:08,299 INFO uname information: 'Linux jv 5.4.0-72-generic #80~18.04.1-Ubuntu SMP Mon Apr 12 23:26:25 UTC 2021 x86_64'
2021-05-21 12:21:08,610 INFO apt version: '1.6.13'
2021-05-21 12:21:08,610 INFO python version: '3.6.9 (default, Jan 26 2021, 15:33:00) 
[GCC 8.4.0]'
2021-05-21 12:21:08,613 INFO release-upgrader version '20.04.33' started
2021-05-21 12:21:08,621 INFO locale: 'en_US' 'UTF-8'
2021-05-21 12:21:08,656 DEBUG screen returned: 'No Sockets found in /run/screen/S-root.

'
2021-05-21 12:21:08,657 INFO re-exec inside screen: '['screen', '-e', '\\0\\0', '-c', 'screenrc', '-S', 'ubuntu-release-upgrade-screen-window', '/tmp/ubuntu
-release-upgrader-923g7i_e/focal', '--mode=server', '--frontend=DistUpgradeViewText']'
admin at jv:/var/log/dist-upgrade/20210521-1221$ 

Hope that helps. Best regards,
Jochen

-- 
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https://bugs.launchpad.net/bugs/1924951

Title:
  Cannot upgrade from 18.04 to 20.04 "An unresolvable problem occured
  while calculating the upgrade."

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

Bug description:
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  I clicked the button to upgrade the system in the dialogue box that
  popped up telling me that there is a new version of the OS I can
  upgrade to.

  After the Distribution upgrade was running for a short while, it
  showed the following error message:

  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'.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 5.4.0-62.70~18.04.1-generic 5.4.78
  Uname: Linux 5.4.0-62-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 19 10:28:34 2021
  InstallationDate: Installed on 2019-09-17 (579 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-04-19 (0 days ago)
  VarLogDistupgradeTermlog:

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