Corruption was my first idea, too, but the Dependencies.txt didn't report debsums mismatches. Thanks for the explanations.
** Also affects: debconf (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1964561 Title: package libpam-runtime 1.3.1-5ubuntu4.3 failed to install/upgrade: installed libpam-runtime package post-installation script subprocess returned error exit status 255 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1964561/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs