The error in your log is: /build/cdebconf-Lc5sq3/cdebconf-0.198ubuntu1/src/debconf.c:241 (main): Cannot initialize debconf frontend
cdebconf is not the default implementation of debconf in Ubuntu (debconf is). Furthermore, your logs show that you have cdebconf-udeb installed, which is not intended for installation on Ubuntu systems - it is a component of the debian-installer. Do you know why cdebconf-udeb is installed here? ** 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/1831221 Title: do-release-upgrade fails due to package libpam0g:amd64 1.1.8-3.2ubuntu2.1 Status in pam package in Ubuntu: Incomplete Bug description: While performing a release upgrade from 14.04 to 16.04, the do- release-upgrade process crashes, apparently due to a failure installing or upgrading the package libpam0g:amd64 1.1.8-3.2ubuntu2.1 ProblemType: Package DistroRelease: Ubuntu 16.04 Package: libpam0g:amd64 1.1.8-3.2ubuntu2.1 ProcVersionSignature: Ubuntu 3.13.0-165.215-generic 3.13.11-ckt39 Uname: Linux 3.13.0-165-generic x86_64 NonfreeKernelModules: rr232x ApportVersion: 2.14.1-0ubuntu3.29 Architecture: amd64 Date: Fri May 31 04:35:26 2019 DuplicateSignature: package:libpam0g:amd64:1.1.8-3.2ubuntu2.1:subprocess installed post-installation script returned error exit status 1 ErrorMessage: subprocess installed post-installation script returned error exit status 1 RelatedPackageVersions: dpkg 1.18.4ubuntu1.5 apt 1.2.31 SourcePackage: pam Title: package libpam0g:amd64 1.1.8-3.2ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: Upgraded to xenial on 2019-05-31 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pam/+bug/1831221/+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