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I do sudo do-release-upgrade, and I got an error message like this one.

An unresolvable problem occurred while calculating the upgrade.

This can be caused by:

  • Upgrading to a pre-release version of Ubuntu
  • Running the current pre-release version of Ubuntu
  • Unofficial software packages not provided by Ubuntu

How I can solve this?

Olli
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user255125
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    Possible duplicate of [Could not calculate the upgrade, what happened?](https://askubuntu.com/questions/360293/could-not-calculate-the-upgrade-what-happened) – Zanna Oct 08 '18 at 20:42

1 Answers1

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Most times it's because of the last point listed: You've got some PPA's enabled which can't be upgraded.

Disable all PPA's you've installed manually and run the upgrade. After upgrading, re-enable them.

This is most easily done via the "Software & Updates" utility.

s3lph
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