Public bug reported: 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'. >From main.log ... 2021-05-17 16:31:04,840 INFO checking for python-dbg (auto_inst=False) 2021-05-17 16:31:04,840 INFO checking for python-doc (auto_inst=False) 2021-05-17 16:31:04,840 INFO checking for python-minimal (auto_inst=False) 2021-05-17 16:31:04,840 INFO installing python-is-python2 because python-minimal was installed 2021-05-17 16:31:04,840 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system) 2021-05-17 16:31:04,900 INFO removing python-minimal because python-is-python2 is being installed 2021-05-17 16:31:04,900 DEBUG Removing 'python-minimal' (python-is-python2 is being installed on the system) 2021-05-17 16:31:04,956 INFO failed to remove python-minimal 2021-05-17 16:31:04,957 INFO checking for python-dev (auto_inst=False) 2021-05-17 16:31:04,957 INFO checking for libpython-dev (auto_inst=False) 2021-05-17 16:31:04,957 INFO checking for libpython-stdlib (auto_inst=False) 2021-05-17 16:31:04,957 INFO removing libpython-stdlib because None is being installed 2021-05-17 16:31:04,957 DEBUG Removing 'libpython-stdlib' (None is being installed on the system) 2021-05-17 16:31:05,013 INFO failed to remove libpython-stdlib 2021-05-17 16:31:05,013 INFO checking for libpython-dbg (auto_inst=False) 2021-05-17 16:31:05,013 INFO checking for python-dbg (auto_inst=True) 2021-05-17 16:31:05,013 INFO checking for python-doc (auto_inst=True) 2021-05-17 16:31:05,013 INFO checking for python-minimal (auto_inst=True) 2021-05-17 16:31:05,013 INFO installing python-is-python2 because python-minimal was installed 2021-05-17 16:31:05,014 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system) 2021-05-17 16:31:05,073 INFO removing python-minimal because python-is-python2 is being installed 2021-05-17 16:31:05,073 DEBUG Removing 'python-minimal' (python-is-python2 is being installed on the system) 2021-05-17 16:31:05,073 INFO failed to remove python-minimal 2021-05-17 16:31:05,073 INFO checking for python-dev (auto_inst=True) 2021-05-17 16:31:05,073 INFO checking for libpython-dev (auto_inst=True) 2021-05-17 16:31:05,073 INFO checking for libpython-stdlib (auto_inst=True) 2021-05-17 16:31:05,073 INFO removing libpython-stdlib because None is being installed 2021-05-17 16:31:05,073 DEBUG Removing 'libpython-stdlib' (None is being installed on the system) 2021-05-17 16:31:05,074 INFO failed to remove libpython-stdlib 2021-05-17 16:31:05,074 INFO checking for libpython-dbg (auto_inst=True) 2021-05-17 16:37:47,739 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.' 2021-05-17 16:37:47,745 DEBUG abort called 2021-05-17 16:37:47,748 DEBUG openCache() 2021-05-17 16:37:51,388 DEBUG Comparing 3.11.0-26 with 2021-05-17 16:37:51,389 DEBUG Comparing 3.13.0-109 with 3.11.0-26 2021-05-17 16:37:51,389 DEBUG Comparing 3.13.0-165 with 3.13.0-109 2021-05-17 16:37:51,390 DEBUG Comparing 3.13.0-96 with 3.13.0-165 2021-05-17 16:37:51,390 DEBUG Comparing 3.8.0-32 with 3.13.0-165 2021-05-17 16:37:51,396 DEBUG Comparing 4.15.0-142 with 3.13.0-165 2021-05-17 16:37:51,396 DEBUG Comparing 4.15.0-143 with 4.15.0-142 2021-05-17 16:37:51,845 DEBUG /openCache(), new cache size 104343 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.44 ProcVersionSignature: Ubuntu 4.15.0-143.147-generic 4.15.18 Uname: Linux 4.15.0-143-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.23 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Mon May 17 17:04:14 2021 InstallationDate: Installed on 2013-05-10 (2929 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) PackageArchitecture: all ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> PATH=(custom, no user) SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to bionic on 2021-05-18 (0 days ago) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928734 Title: Upgrade from 18.04 to 20.04 failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1928734/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs