package resolvconf 1.77ubuntu1 failed to install/upgrade: underproces installerede post-installation-script returnerede afslutningsstatus 1

[Hazard Klubben]

Upgrade 14.04 LTS to 16.04
...
Upgrade first from 14.04 to 15.10, which failed (locked screen for hours).
apt-get dist-upgrade

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: resolvconf 1.77ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic i686
ApportVersion: 2.19.1-0ubuntu5
AptOrdering:
 resolvconf: Configure
 NULL: ConfigurePending
Architecture: i386
Date: Sat May 7 15:31:59 2016
DuplicateSignature: package:resolvconf:1.77ubuntu1:underproces installerede post-installation-script returnerede afslutningsstatus 1
ErrorMessage: underproces installerede post-installation-script returnerede afslutningsstatus 1
InstallationDate: Installed on 2011-12-03 (1616 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu2
SourcePackage: resolvconf
Title: package resolvconf 1.77ubuntu1 failed to install/upgrade: underproces installerede post-installation-script returnerede afslutningsstatus 1
UpgradeStatus: Upgraded to wily on 2016-05-07 (0 days ago)