I had a version of this bug. - starting from 18.04 LTS, with all package updates
- software-updater didn't offer 20.04 (surprised me this many months after 20.04 was released) - followed https://ubuntu.com/blog/how-to-upgrade-from-ubuntu-18-04-lts- to-20-04-lts-today - all went well until process "focal" (a python script) took 90 minutes of CPU with no progress - it had two defunct children (which means that the code hadn't reaped them -- not good) - I did an strace on focal and it seemed to be doing short write(1) system calls - the last thing in the terminal sub-window was processing triggers for sgml. I did "killall focal" and the update ground to a halt. I tried "apt update" and "apt full-upgrade" and got (only) a long long list of things to autoremove. I rebooted (it worked) and did an autoremove. Now I wonder how many other package triggers never ran and how to fix that. Fundamentally, I think that the problem flows from this bug. There are several other reports that might be related: https://launchpad.net/ubuntu/+source/sgml-base/+bugs?field.tag=apport-package -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to sgml-base in Ubuntu. https://bugs.launchpad.net/bugs/1880339 Title: package sgml-base 1.29.1 failed to install/upgrade: triggers looping, abandoned Status in sgml-base package in Ubuntu: Confirmed Bug description: During the upgrade from ubuntu 18.04 LTS to 20.04 the installation crashed because it could not install the package sgml-base. I rebooted the computer and got the bug I am reporting. I have attached the print of the error. ProblemType: Package DistroRelease: Ubuntu 20.04 Package: sgml-base 1.29.1 ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34 Uname: Linux 5.4.0-31-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip Date: Sat May 23 17:29:08 2020 ErrorMessage: triggers looping, abandoned InstallationDate: Installed on 2020-04-20 (32 days ago) InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1) PackageArchitecture: all Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2 PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4 RelatedPackageVersions: dpkg 1.19.7ubuntu3 apt 2.0.2ubuntu0.1 SourcePackage: sgml-base Title: package sgml-base 1.29.1 failed to install/upgrade: triggers looping, abandoned UpgradeStatus: Upgraded to focal on 2020-05-23 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sgml-base/+bug/1880339/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
