I just upgraded a 14.04 server to 16.04 using the standard do-release-upgrade process. Now I'm getting "No new release found" when trying to run it again to get to 18.04.

Things tried:

  • sudo apt update
  • sudo apt upgrade
  • sudo apt dist-upgrade
  • sudo apt full-upgrade
  • sudo do-release-upgrade ("No new release found.")
  • sudo do-release-upgrade -d ("Upgrades to the development release are only available from the latest supported release.")
  • sudo do-release-upgrade -p ("No new release found.")
  • wget http://changelogs.ubuntu.com/meta-release (successfully gets the file, it shows the correct data including the 18.04 info)
  • sudo apt install update-manager-core ("update-manager-core is already the newest version (1:16.04.17).")
  • vim /etc/update-manager/release-upgrades (prompt is set to "lts" as expected)


  • Why isn't 18.04 being found and offered to upgrade? I don't understand how do-release-upgrade works under the hood and why it'd throw "no new release found" when it is successfully accessing the meta-release file, the file has the correct data and there is a newer LTS release with a point version out.
  • How do I upgrade this machine? What is the best and safest workaround?
  • Which "development release" appears on do-release-upgrade -d? Probably updates are disabled in Software & Updates. – Pilot6 May 6 '20 at 15:19
  • It doesn't show any release. Just says that error. Are you talking about the GUI Software & Updates? This machine doesn't have a GUI installed. – thunderblaster May 6 '20 at 15:20

Please try installing the ca-certificates package and then running 'do-release-upgrade'. The fix for this issue is in progress you can follow it via https://launchpad.net/bugs/1796940.

  • ca-certificates is already installed and up-to-date. Looks like the usual indicator of that issue is Failed to connect to https://changelogs.ubuntu.com/meta-release-development. Check your Internet connection or proxy settings, which is not the result I'm experiencing. – thunderblaster May 8 '20 at 13:04
  • 1
    Could you paste the output of "DEBUG_UPDATE_MANAGER=1 do-release-upgrade"? – Brian Murray May 8 '20 at 17:18
  • You're a hero. It's a cert error and it's because of the corporate content filtering. – thunderblaster May 8 '20 at 17:51
  • If you wanted to post an answer explaining the use of DEBUG_UPDATE_MANAGER, I'd gladly accept it. I googled around and didn't come across that, and it's exactly the sort of additional info I was looking for to debug that extremely opaque error. – thunderblaster May 8 '20 at 17:54

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