package libvirt-bin 1.3.1-1ubuntu10.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Chris Miles]

During regular updates errors reported; on system restart libvirt-bin has failed to start

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libvirt-bin 1.3.1-1ubuntu10.8
ProcVersionSignature: Ubuntu 4.4.0-63.84-generic 4.4.44
Uname: Linux 4.4.0-63-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Sun Feb 12 19:34:41 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-12-28 (412 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
ProcCmdline: BOOT_IMAGE=/vmlinuz-4.4.0-63-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: libvirt
Title: package libvirt-bin 1.3.1-1ubuntu10.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2017-01-08 (34 days ago)

[Chris Miles (chrismil-cix)]

Investigating. Suspect the failure is because configuration of libvirt is incomplete

[Chris Miles (chrismil-cix)]

Performing the steps from comment 34 worked around the breakage.
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1386465/comments/34

[Christian Ehrhardt  (paelzer)]

Hi Chris,
thank you for mentioning that the comment in bug 1386465 there worked for you.
This seems also to be the same or at least related to bug 1594902.

I'm debugging this right now - but the history on these bugs shows me that it often is unreproducible for the debuggers (also see comment #40 on 1386465) and ends up with open questions and expires then.

Would you mind answering the last few from these bugs, but for your case:
1. "Is it possible that you did not reboot after the release upgrade?"
2. and from bug 1594902 did you dmesg (or now after reboots your log) contain similar DENIED messages => https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1594902/comments/19 ?

Feel free to answer this here, but I'll mark this as a duplicate and hope that all people together might be able to find the missing bits in the config to generate a valid reproducing case.