Even though you have all the 3rd party options unticked you still have
xorg packages from a PPA and the versions of those packages are greater
than the release to which you are trying to upgrade so the upgrade
calculation fails.  You'll need to use ppa-purge to remove that PPA.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1681197

Title:
  16.04 - 16.10 to 17.04 upgrade fail

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