I finally removed the partner/binary-amd64/Packages reference in sources.list as a way for complete the upgrade. So I'm not having this problem anymore.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/792090 Title: upgrade to natty from maverick on x86_64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/792090/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs