This error is produced because before the installation you didn't removed the gnome ppa along with the packages. This is evident since those package gnome-settings-daemon 3.10.2-0ubuntu1~saucy6 is not present in saucy repositories, but in gnome PPA's. You can try removing one by one using dpkg all those packages ending in saucy, remove all the PPA repositories and use aptitude remove '?version(*saucy*)' if you have it installed, or reinstall your system.
** Changed in: gnome-settings-daemon (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1278863 Title: package gnome-settings-daemon-schemas (not installed) failed to install/upgrade: tentative de remplacement de « /usr/share/GConf/gsettings/gnome-settings-daemon.convert », qui appartient aussi au paquet gnome-settings-daemon 3.10.2-0ubuntu1~saucy6 Status in “gnome-settings-daemon” package in Ubuntu: Invalid Bug description: I cannot install/remove/modify any packages now because of this error. It happens when i start Ubuntu and when i try to upgrade/update. OS Version Ubuntu 14.04 TT Alpha2 What i expected to happen : Package gnome settings deamon shemas to be installed What i got : Install error about the package. Tested : apt-get --configure -a apt-get autoclean apt-get clean apt-get (-f) update/(dist-)upgrade apt-get -f install ProblemType: Package DistroRelease: Ubuntu 14.04 Package: gnome-settings-daemon-schemas (not installed) ProcVersionSignature: Ubuntu 3.13.0-8.27-generic 3.13.2 Uname: Linux 3.13.0-8-generic x86_64 ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 Date: Mon Feb 10 11:22:30 2014 DuplicateSignature: package:gnome-settings-daemon-schemas:(not installed):tentative de remplacement de « /usr/share/GConf/gsettings/gnome-settings-daemon.convert », qui appartient aussi au paquet gnome-settings-daemon 3.10.2-0ubuntu1~saucy6 ErrorMessage: tentative de remplacement de « /usr/share/GConf/gsettings/gnome-settings-daemon.convert », qui appartient aussi au paquet gnome-settings-daemon 3.10.2-0ubuntu1~saucy6 InstallationDate: Installed on 2013-12-11 (62 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: gnome-settings-daemon Title: package gnome-settings-daemon-schemas (not installed) failed to install/upgrade: tentative de remplacement de « /usr/share/GConf/gsettings/gnome-settings-daemon.convert », qui appartient aussi au paquet gnome-settings-daemon 3.10.2-0ubuntu1~saucy6 UpgradeStatus: Upgraded to trusty on 2014-01-27 (14 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1278863/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp