Thank you for taking the time to report this issue and helping to improve Ubuntu.
This is a serious class of upgrade failure, but unfortunately the bug report as filed doesn't contain enough information to reproduce or debug it. How did you do the update to 20.04? Was this using apt from the commandline, or do-release-upgrade or update-manager? If you used do-release-upgrade or update-manager, can you please attach the full /var/log/dist-upgrade/apt-term.log from your system? ** Changed in: pam (Ubuntu) Importance: Undecided => Critical ** Changed in: pam (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pam in Ubuntu. https://bugs.launchpad.net/bugs/1871960 Title: package libpam-modules 1.1.8-3.6ubuntu2.18.04.1 failed to install/upgrade: pre-dependency problem - not installing libpam- modules:amd64 Status in pam package in Ubuntu: Incomplete Bug description: I was updating ubuntu to the 20.04 version. Not all packages were updated. I receive new errors every few seconds. what should I do? Thanks safi ProblemType: Package DistroRelease: Ubuntu 20.04 Package: libpam-modules 1.1.8-3.6ubuntu2.18.04.1 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu25 Architecture: amd64 Date: Fri Apr 10 00:36:08 2020 ErrorMessage: pre-dependency problem - not installing libpam-modules:amd64 InstallationDate: Installed on 2019-12-28 (102 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2 PythonDetails: N/A RelatedPackageVersions: dpkg 1.19.7ubuntu3 apt 2.0.1ubuntu1 SourcePackage: pam Title: package libpam-modules 1.1.8-3.6ubuntu2.18.04.1 failed to install/upgrade: pre-dependency problem - not installing libpam-modules:amd64 UpgradeStatus: Upgraded to focal on 2020-04-09 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pam/+bug/1871960/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp