17.10 upgrade Digikam 5.6 and Showfoto would not install

[Peter Kay]

Error message was that Digikam depended on digikam-private-libs which could not be installed due to a dependency error.
A package dependency search through Aptitude finally revealed that the problem was libsane-common.
This package was 1.0.27+git20171029-artful-0. The suggested downgrade to 1.0.27~experimental2ubuntu1 was accepted and the installation of Digikam 5.6 and Showfoto went ahead without further problems.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: digikam 4:5.6.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Fri Nov 3 12:50:11 2017
InstallationDate: Installed on 2013-03-06 (1703 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: digikam
UpgradeStatus: No upgrade log present (probably fresh install)

[Rik Mills (rikmills)]

On 03/11/17 14:02, Peter Kay wrote:
> Public bug reported:
>
> Error message was that Digikam depended on digikam-private-libs which could not be installed due to a dependency error.
> A package dependency search through Aptitude finally revealed that the problem was libsane-common.
> This package was 1.0.27+git20171029-artful-0. The suggested downgrade to 1.0.27~experimental2ubuntu1 was accepted and the installation of Digikam 5.6 and Showfoto went ahead without further problems.

That package version is from an unsupported PPA such as

https://launchpad.net/~rolfbensch/+archive/ubuntu/sane-git

so this is not a bug in Ubuntu/Kubuntu, but is due to the use of git
builds from a PPA that may not be compatible with the version
dependencies of the official Digikam packages.

Your downgrade was to the ubuntu archive version of libsane, which
explains why that then works.