I've encountered the same problem. I received message for 'sgml-base' and 'linux-image-5.0.0-13-generic':
""Could not install 'sgml-base' The upgrade will continue but the 'sgml-base' package may not be in a working state. Please consider submitting a bug report about it. triggers looping, abandoned" Followed by the same message for 'linux-image-5.0.0-13-generic'. When the upgrade from 18.10 to 19.04 finished it showed: "Could not install the upgrades. The upgrade has aborted. Your system could be in unstable state. A recovery will run now (dpkg --configure -a)" Other than the package involved this seems a duplicate of https://bugs.launchpad.net/bugs/1823004 In looking at the crash logs they lead to the same conclusion as in https://bugs.launchpad.net/ubuntu/+source/ubuntu-release- upgrader/+bug/1823004/comments/5 -- 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/1823272 Title: package sgml-base 1.29 failed to install/upgrade: eindeloze triggerlus; afgebroken Status in sgml-base package in Ubuntu: Confirmed Bug description: upgrade from 18:10 to 19:04 ProblemType: Package DistroRelease: Ubuntu 19.04 Package: sgml-base 1.29 ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1 Uname: Linux 5.0.0-8-generic x86_64 ApportVersion: 2.20.10-0ubuntu25 Architecture: amd64 Date: Fri Apr 5 00:33:37 2019 ErrorMessage: eindeloze triggerlus; afgebroken InstallationDate: Installed on 2016-12-31 (824 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) PackageArchitecture: all Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.3-1 PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1 RelatedPackageVersions: dpkg 1.19.6ubuntu1 apt 1.8.0 SourcePackage: sgml-base Title: package sgml-base 1.29 failed to install/upgrade: eindeloze triggerlus; afgebroken UpgradeStatus: Upgraded to disco on 2019-04-04 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sgml-base/+bug/1823272/+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