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'.

[Dan Bampoh]

I think we need more information about what to look for and how to solve issues in /var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log. Simple asking that we look there is not enough information to help resolve the issue - some specifics or examples would be helpful - you could for instance generate an additional log file or ReadMe for how to debug or correct typical issues that arise with upgrade failure that require examining the main.log or apt.log to resolve - with short faqs or examples of what to look for in general and how to go about it.

I get the following when I try to upgrade from Ubuntu 22.04 Jammy Jellyfish to 23.10 Mantic Minotaur

~$ sudo do-release-upgrade
Checking for a new Ubuntu release

= Welcome to Ubuntu 23.10 'Mantic Minotaur' =

The Ubuntu team is proud to announce Ubuntu 23.10 'Mantic Minotaur'.

To see what's new in this release, visit:
  https://wiki.ubuntu.com/ManticMinotaur/ReleaseNotes

Ubuntu is a Linux distribution for your desktop or server, with a fast
and easy install, regular releases, a tight selection of excellent
applications installed by default, and almost any other software you
can imagine available through the network.

We hope you enjoy Ubuntu.

== Feedback and Helping ==

If you would like to help shape Ubuntu, take a look at the list of
ways you can participate at

  http://www.ubuntu.com/community/participate/

Your comments, bug reports, patches and suggestions will help ensure
that our next release is the best release of Ubuntu ever. If you feel
that you have found a bug please read:

  http://help.ubuntu.com/community/ReportingBugs

Then report bugs using apport in Ubuntu. For example:

  ubuntu-bug linux

will open a bug report in Launchpad regarding the linux package.

If you have a question, or if you think you may have found a bug but
aren't sure, first try asking on the #ubuntu or #ubuntu-bugs IRC
channels on Libera.Chat, on the Ubuntu Users mailing list, or on the
Ubuntu forums:

  http://help.ubuntu.com/community/InternetRelayChat
  http://lists.ubuntu.com/mailman/listinfo/ubuntu-users
  http://www.ubuntuforums.org/

== More Information ==

You can find out more about Ubuntu on our website, IRC channel and wiki.
If you're new to Ubuntu, please visit:

  http://www.ubuntu.com/

To sign up for future Ubuntu announcements, please subscribe to Ubuntu's
very low volume announcement list at:

  http://lists.ubuntu.com/mailman/listinfo/ubuntu-announce

Continue [yN] y
-----

Reading cache

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

Checking for installed snaps
...
...
...
Get:74 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe amd64 Packages [92,0 kB]
Get:75 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe Translation-en [33,7 kB]
Get:76 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe amd64 DEP-11 Metadata [3.864 B]
Get:77 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe DEP-11 48x48 Icons [4.111 B]
Get:78 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe DEP-11 64x64 Icons [8.636 B]
Get:79 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe DEP-11 64x64@2 Icons [29 B]
Get:80 http://us.archive.ubuntu.com/ubuntu mantic-updates/universe amd64 c-n-f Metadata [820 B]
Get:81 http://us.archive.ubuntu.com/ubuntu mantic-updates/multiverse amd64 Packages [4.284 B]
Get:82 http://us.archive.ubuntu.com/ubuntu mantic-updates/multiverse Translation-en [932 B]
Get:83 http://us.archive.ubuntu.com/ubuntu mantic-updates/multiverse amd64 c-n-f Metadata [232 B]
Fetched 164 MB in 6s (1.309 kB/s)

Checking package manager
Reading package lists... Done
Building dependency tree... Done
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... Done
Reading state information... Done
=== Command terminated with exit status 1 (Tue Dec 19 22:45:29 2023) ===

Get:1 Upgrade tool signature [833 B]
Get:2 Upgrade tool [1.267 kB]
Fetched 1.268 kB in 0s (0 B/s)
authenticate 'mantic.tar.gz' against 'mantic.tar.gz.gpg'
extracting 'mantic.tar.gz'
[screen is terminating]

I think we need more information about what to look for and how to solve issues in /var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log. Simple asking that we look there is not enough information to help resolve the issue - some specifics or examples would be helpful - you could for instance generate an additional log file or ReadMe for how to debug or correct typical issues that arise with upgrade failure that require examining the main.log or apt.log to resolve - with short faqs or examples of what to look for in general and how to go about it.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: ubuntu-release-upgrader-core 1:23.04.7
ProcVersionSignature: Ubuntu 5.14.0-1036.40-oem 5.14.21
Uname: Linux 5.14.0-1036-oem x86_64
ApportVersion: 2.26.1-0ubuntu2.1
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
 640:15085:121:387254:2023-12-19 16:54:03.573844556 +0100:2023-12-19 16:54:00.445916104 +0100:/var/crash/_usr_lib_x86_64-linux-gnu_indicator-messages_indicator-messages-service.15085.crash
 600:0:121:1487976:2023-12-19 16:15:59.463804161 +0100:2023-12-19 16:21:25.186876493 +0100:/var/crash/virtualbox-dkms.0.crash
 600:0:121:1474140:2023-12-19 16:15:37.747297207 +0100:2023-12-19 16:21:24.538873126 +0100:/var/crash/fwts-efi-runtime-dkms.0.crash
CurrentDesktop: ubuntu:GNOME
Date: Tue Dec 19 22:25:42 2023
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for the OEM CDs
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-sutton-focal-amd64-20210824-1046+pc-sutton-bachman-focal-amd64+X00
InstallationDate: Installed on 2021-09-02 (838 days ago)
InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20210824-09:39
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to lunar on 2023-12-19 (0 days ago)
VarLogDistupgradeAptHistorylog:
 Start-Date: 2023-12-19 22:24:39
 Requested-By: bampoh-d (15085)
 End-Date: 2023-12-19 22:24:39
VarLogDistupgradeApttermlog: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-term.log'
VarLogDistupgradeTermlog:

[Eduardo Barretto (ebarretto)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.