package alsa-utils 1.0.28-1ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[mn]

Trying to reinstall alsa-utils to resolve a problem with audio after upgrade to 15.04. I'm using synaptic.

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: alsa-utils 1.0.28-1ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
Uname: Linux 3.19.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
Date: Wed May 27 20:05:22 2015
DuplicateSignature: package:alsa-utils:1.0.28-1ubuntu2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-07-04 (327 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1
 apt 1.0.9.7ubuntu4
SourcePackage: alsa-utils
Title: package alsa-utils 1.0.28-1ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to vivid on 2015-05-04 (23 days ago)

[mn (mnavas)]

Bug report can be closed. The reason for failure was a recently added service lacking insserv headers, causing a failure on post-install script.