This would seem to be a package management problem, or something gone wrong in the system otherwise.
Like it suggests, I'd reinstall the offending package and reinstall it. If you're using Unity 7 as your desktop (or GNOME 3, or XFCE, but not KDE or Unity 8), it is relatively safe to do the following on the command line: sudo apt purge qtdeclarative5-xmllistmodel-plugin Take a note of the packages it removes, so you can re-install if necessary. For example, you might want to: sudo apt install ubuntu-desktop unity8 ** Package changed: qtdeclarative-opensource-src (Ubuntu) => apt (Ubuntu) ** Changed in: apt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1503043 Title: package qtdeclarative5-xmllistmodel-plugin:amd64 5.2.1-3ubuntu15.1 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration Status in apt package in Ubuntu: Incomplete Bug description: every time there is software update there is an error ProblemType: Package DistroRelease: Ubuntu 14.04 Package: qtdeclarative5-xmllistmodel-plugin:amd64 5.2.1-3ubuntu15.1 ProcVersionSignature: Ubuntu 3.16.0-50.66~14.04.1-generic 3.16.7-ckt16 Uname: Linux 3.16.0-50-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.15 Architecture: amd64 Date: Tue Oct 6 02:24:32 2015 DuplicateSignature: package:qtdeclarative5-xmllistmodel-plugin:amd64:5.2.1-3ubuntu15.1:package is in a very bad inconsistent state; you should reinstall it before attempting configuration ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration InstallationDate: Installed on 2015-08-06 (59 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) RelatedPackageVersions: dpkg 1.17.5ubuntu5.4 apt 1.0.1ubuntu2.10 SourcePackage: qtdeclarative-opensource-src Title: package qtdeclarative5-xmllistmodel-plugin:amd64 5.2.1-3ubuntu15.1 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1503043/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp