Your dpkg log shows the following prompt:
Configuring libpam-modules
you are using pam_tally or pam_tally2 in your configuration
The pam_tally and pam_tally2 modules have been removed from PAM. You are
using one of these modules in
your PAM configuration in /etc/pam.d. You must remove the uses of these
modules before PAM can be
upgraded; including these modules in your PAM configuration after the
upgrade will stop users from
being able to log into the system.
Consider the pam_faillock module as a replacement for pam_tally.
This is not a bug. The pam package is saving you from making it
impossible to log into your system after upgrade.
If you were using the supported `do-release-upgrade` tool for upgrading
between releases, this would have notified you at the beginning of the
upgrade and not resulted in a package upgrade failure.
** Changed in: pam (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2067013
Title:
package libpam-modules 1.3.1-5ubuntu4.7 failed to install/upgrade: new
libpam-modules:amd64 package pre-installation script subprocess
returned error exit status 2
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