package apparmor 2.12-4ubuntu5.1 failed to install/upgrade: installed apparmor package post-installation script subprocess returned error exit status 12

[Thomas Leavitt]

I was running "do-release-upgrade".

It prompted me that my /etc/ssh/sshd_config file was different from the maintainers; I went to look at the differences, and somehow I wasn't able to go back and say "keep my version", instead things errored out.

I was able to recover at the end of the process.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: apparmor 2.12-4ubuntu5.1
ProcVersionSignature: Ubuntu 4.15.0-91.92~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-91-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.12
Architecture: amd64
Date: Fri Mar 27 20:01:57 2020
Df:

Dmesg:

ErrorMessage: installed apparmor package post-installation script subprocess returned error exit status 12
InstallationDate: Installed on 2017-05-04 (1057 days ago)
InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8)
ProcKernelCmdline: BOOT_IMAGE=/boot/vmlinuz-4.15.0-91-generic root=UUID=9e033fda-4dfa-44ab-9f9d-2984aae489de ro quiet splash pcie_aspm=off vt.handoff=7
Python3Details: /usr/bin/python3.6, Python 3.6.9, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.3
 apt 1.6.12
SourcePackage: apparmor
Syslog:
 Mar 27 18:17:18 laptopsanytime dbus[861]: [system] AppArmor D-Bus mediation is enabled
 Mar 27 18:20:14 laptopsanytime dbus[955]: [system] AppArmor D-Bus mediation is enabled
 Mar 27 18:22:56 laptopsanytime dbus[963]: [system] AppArmor D-Bus mediation is enabled
 Mar 27 19:02:11 laptopsanytime dbus[865]: [system] AppArmor D-Bus mediation is enabled
Title: package apparmor 2.12-4ubuntu5.1 failed to install/upgrade: installed apparmor package post-installation script subprocess returned error exit status 12
UpgradeStatus: Upgraded to bionic on 2020-03-27 (0 days ago)

[Seth Arnold (seth-arnold)]

Hello Thomas,

That's a very dirty upgrade log, quite a lot failed. Is this a small-memory system? Do you know what may make this system unique in showing these errors? I don't have a lot of ideas where things would have gone off the rails otherwise.

Thanks