Hi RedSingularity Dont thank me :) I have to thank you for your time!
Indeed I installed quite some apps/updates from PPAs. Here the output from your command: xserver-xorg-core: Installiert: 2:1.9.2.901+git20101129+server-1.9-branch.65f2ab20-0ubuntu0sarvatt2~maverick Kandidat: 2:1.9.2.901+git20101129+server-1.9-branch.65f2ab20-0ubuntu0sarvatt2~maverick Versionstabelle: *** 2:1.9.2.901+git20101129+server-1.9-branch.65f2ab20-0ubuntu0sarvatt2~maverick 0 500 http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu/ maverick/main i386 Packages 100 /var/lib/dpkg/status 2:1.9.0-0ubuntu7.3 0 500 http://ch.archive.ubuntu.com/ubuntu/ maverick-updates/main i386 Packages 2:1.9.0-0ubuntu7 0 500 http://ch.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/748470 Title: update from 10.10 to 11.04 beta 1 with update-manager fails -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs