Hi Michael, Thanks to take care of my issue.
I tried and have a problem with a Medibuntu package. I then have disactivated it in aptitude and tried again. I now have the same problem as in the beginning. Here are my logs. ** Attachment added: "apt.log" http://launchpadlibrarian.net/10171028/apt.log -- Impossible to upgrade Feisty => Gutsy https://bugs.launchpad.net/bugs/154981 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs