Thanks for your report. You have several packages from the Point Cloud PPA (https://launchpad.net/~v-launchpad-jochen-sprickerhof-de/+archive/pcl) that depend on version of packages in 13.04 or 13.10 not available in 14.04.
One way to upgrade is to remove these 3rd party packages before the upgrade and reinstall them afterwards. I'm closing this report because it is not a bug in Ubuntu. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1309912 Title: Problems while uprading to ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1309912/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs