Well looking closer at your apt.log, it seems you have A LOT of packages installed from custom PPA's. That is whats causing the failures. I would like to see one more apt-cache though:
apt-cache policy xserver-xorg-core Thanks. -- 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
