package dbus 1.10.6-1ubuntu1 failed to install/upgrade: triggers looping, abandoned

After upgrading to xenial. Some errors occurred and after several iteration of apt-get check, -f install, updage, upgrade, ... apt-get tells me my system is up to date and no errors but... My unity is down. I have no right panel, no window borders... just the background image.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: dbus 1.10.6-1ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
Date: Wed Feb 3 02:45:26 2016
ErrorMessage: triggers looping, abandoned
InstallationDate: Installed on 2015-05-02 (276 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.1.10
SourcePackage: dbus
Title: package dbus 1.10.6-1ubuntu1 failed to install/upgrade: triggers looping, abandoned
UpgradeStatus: Upgraded to xenial on 2016-02-03 (0 days ago)