Thanks for reporting this bug and help in making Ubuntu better. Sorry for the long delay in getting an answer for this report.
According to the logs you attached the bug was caused by the upgrader not dealing well with the "noveau" open NVIDIA drivers. If this is still an issue for you please feel free to mark the status of this report as "New" again, otherwise please ignore this message. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1068996 Title: Kubuntu upgrade to 12.10 failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1068996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs