I have exactly the same problem, here some output of "sudo apt-get -o Debug::pkgProblemResolver=yes dist-upgrade" if it can help...
Lecture des listes de paquets... Fait Construction de l'arbre des dépendances Lecture des informations d'état... Fait Calcul de la mise à jour... Starting pkgProblemResolver with broken count: 3 Starting 2 pkgProblemResolver with broken count: 3 Investigating (0) libgl1-mesa-dri-lts-utopic [ amd64 ] < 10.3.2-0ubuntu1~trusty2 > ( libs ) Broken libgl1-mesa-dri-lts-utopic:amd64 Est en conflit avec on libgl1-mesa-dri [ amd64 ] < none -> 10.6.0~git20150616+10.6.5d327b37-0ubuntu0ricotz~trusty > ( libs ) Considering libgl1-mesa-dri:amd64 5 as a solution to libgl1-mesa-dri-lts-utopic:amd64 14 Added libgl1-mesa-dri:amd64 to the remove list Conflicts//Breaks against version 10.1.3-0ubuntu0.4 for libgl1-mesa-dri but that is not InstVer, ignoring Conflicts//Breaks against version 10.1.0-4ubuntu5 for libgl1-mesa-dri but that is not InstVer, ignoring Fixing libgl1-mesa-dri-lts-utopic:amd64 via keep of libgl1-mesa-dri:amd64 Investigating (0) libgbm1 [ amd64 ] < 10.1.3-0ubuntu0.4 -> 10.6.0~git20150616+10.6.5d327b37-0ubuntu0ricotz~trusty > ( libs ) Broken libgbm1:amd64 Dépend on libgl1-mesa-dri [ amd64 ] < none -> 10.6.0~git20150616+10.6.5d327b37-0ubuntu0ricotz~trusty > ( libs ) (= 10.6.0~git20150616+10.6.5d327b37-0ubuntu0ricotz~trusty) Considering libgl1-mesa-dri:amd64 5 as a solution to libgbm1:amd64 0 Holding Back libgbm1:amd64 rather than change libgl1-mesa-dri:amd64 Try to Re-Instate (1) libgbm1:amd64 Done Fait Starting pkgProblemResolver with broken count: 0 Starting 2 pkgProblemResolver with broken count: 0 Done Les paquets suivants ont été conservés : libgbm1 0 mis à jour, 0 nouvellement installés, 0 à enlever et 1 non mis à jour. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1431714 Title: [xorg-edgers] Held broken packages (libgbm1) from Xorg-edgers PPA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1431714/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
