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Tried do-release-upgrade -d on a 16.04 machine today but got

Upgrades to the development release are only 
available from the latest supported release.

Surely LTS to LTS is allowed?

Result of cat /etc/update-manager/release-upgrades is Prompt=lts

Organic Marble
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    15 days is not too long, you can wait for official release. My clean 16.04 LTS says that bionic is available. Check your `cat /etc/update-manager/release-upgrades | grep Prompt` (my has `lts`). – N0rbert Apr 11 '18 at 21:00
  • It's set for LTS. – Organic Marble Apr 11 '18 at 21:10
  • @OrganicMarble can you include the output of `cat /etc/update-manager/release-upgrades` here? This should be working, but something might be amiss on your system specifically preventing you from doing the direct upgrade attempt. – Thomas Ward Apr 11 '18 at 21:22
  • What is the output of `apt-cache policy ubuntu-release-upgrader-core`? – N0rbert Apr 11 '18 at 21:23
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    Possible duplicate of [How do I upgrade to a newer version of Ubuntu?](https://askubuntu.com/questions/110477/how-do-i-upgrade-to-a-newer-version-of-ubuntu) – N0rbert Apr 11 '18 at 21:32
  • This turned out to be a connection problem with a terribly un-informative error message. – Organic Marble Apr 11 '18 at 21:43

1 Answers1

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Remove any files in ~/.cache/update-manager-core/ and try the upgrade process again.

Thomas Ward
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Brian Murray
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