voici apt-cache policy
root@debian:/home/theau# apt-cache policy
Fichiers du paquet :
100 /var/lib/dpkg/status
release a=now
500 http://www.deb-multimedia.org/ stable/non-free amd64 Packages
release o=Unofficial Multimedia Packages,a=stable,n=wheezy,l=Unofficial Multimedia Packages,c=non-free
origin www.deb-multimedia.org
500 http://www.deb-multimedia.org/ stable/main amd64 Packages
release o=Unofficial Multimedia Packages,a=stable,n=wheezy,l=Unofficial Multimedia Packages,c=main
origin www.deb-multimedia.org
500 http://security.debian.org/ stable/updates/non-free Translation-en
500 http://security.debian.org/ stable/updates/contrib Translation-en
500 http://security.debian.org/ stable/updates/non-free amd64 Packages
release v=7.0,o=Debian,a=stable,n=wheezy,l=Debian-Security,c=non-free
origin security.debian.org
500 http://security.debian.org/ stable/updates/contrib amd64 Packages
release v=7.0,o=Debian,a=stable,n=wheezy,l=Debian-Security,c=contrib
origin security.debian.org
500 http://ftp.fr.debian.org/debian/ stable-updates/contrib amd64 Packages
release o=Debian,a=stable-updates,n=wheezy-updates,l=Debian,c=contrib
origin ftp.fr.debian.org
500 http://ftp.fr.debian.org/debian/ stable-updates/main amd64 Packages
release o=Debian,a=stable-updates,n=wheezy-updates,l=Debian,c=main
origin ftp.fr.debian.org
500 http://ftp.fr.debian.org/debian/ stable-backports/non-free Translation-en
500 http://ftp.fr.debian.org/debian/ stable-backports/main Translation-en
500 http://ftp.fr.debian.org/debian/ stable-backports/contrib Translation-en
100 http://ftp.fr.debian.org/debian/ stable-backports/non-free amd64 Packages
release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=non-free
origin ftp.fr.debian.org
100 http://ftp.fr.debian.org/debian/ stable-backports/contrib amd64 Packages
release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=contrib
origin ftp.fr.debian.org
100 http://ftp.fr.debian.org/debian/ stable-backports/main amd64 Packages
release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=main
origin ftp.fr.debian.org
Paquets épinglés :
mais aussi apt-cache policy
root@debian:/home/theau# apt-cache policy linux-image-amd64
linux-image-amd64:
Installé : 3.16+61~bpo70+1
Candidat : 3.16+61~bpo70+1
Table de version :
*** 3.16+61~bpo70+1 0
100 http://ftp.fr.debian.org/debian/ stable-backports/main amd64 Packages
100 /var/lib/dpkg/status
Effectivement je verrais bien l’absence de fichier preferences responsable de ce fait …