Hitting the same problem on my desktop machine. I disabled all my non- Ubuntu repos (but did not uninstall their packages).
The workaround from #3 seemed to do the trick in that the install of newer packages is progressing. Not sure yet if I end up with a bootable and usable system at the end of this :-P -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/990740 Title: upgrading from lucid to precise fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-defaults/+bug/990740/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs