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So I'm attempting to upgrade to 16.04 LTS on my 15.10 machine and it doesn't seem to recognize that the upgrade is available. Are there any suggestions where to start investigating this issue? So far nothing has indicated where I might start looking to solve this.

The result of sudo do-release-upgrade -cd is:

Checking for a new Ubuntu release
No new release found
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  • Is this kind of upgrade the same as for LTS to LTS? In which case you would need to wait a couple more months for the first point release (that post also has some instructions for circumventing this).
    – Dɑvïd
    Apr 28, 2016 at 13:06
  • In theory they -d should set it too use the 'Development' Release which should be available. Which is why the whole issue is somewhat baffling.
    – Drahkar
    Apr 28, 2016 at 14:38

3 Answers 3

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If you edit /etc/update-manager/release-upgrades and change Prompt=lts to Prompt=normal - then it will update.

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  • This did the trick. Was finally able to upgrade after I implemented this change. Thank you!
    – Drahkar
    May 11, 2016 at 20:59
  • 1
    Good that this works for you. However, there are IMHO 2 contra-intuïtive things in this: -Drahkar says he had 15.10 which is not an LTS, how did the "Prompt=lts" end up in /etc/update-manager/release-upgrades? -16.04 is an LTS, why does it require Prompt=normal? This sounds like buggy behaviour to me.
    – jringoot
    Oct 17, 2016 at 6:43
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Try:

$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get dist-upgrade
$ sudo update-manager -d

Then a window should pop up, checking for new releases and you should be able to select "Actualize to 16.04." (or similar)

At least this is how I did it.

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  • "upgrade" ... not "updrage" I would edit but for edit to save there must be at least 6 characters modified. Apr 28, 2016 at 12:45
  • That ultimately ends up with the same issue as running sudo do-release-upgrade -cd where it acts like there is nothing to update. The whole thing is reacting like it does not see any available updates, regardless to what setting I change it to. Development releases, proposed releases, all end up saying there are no updates. Figured the next step was to see if anyone else had suggestions, so here I am.
    – Drahkar
    Apr 28, 2016 at 12:47
  • 1
    @NonStandardModel just delete the whole word "updrage" and type "upgrade"... ;-)
    – Jos
    Apr 28, 2016 at 12:58
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It took a few days after the release day, but upgrading to 16.04 is now enabled, so 15.10 users should normally be notified when running Software Updater (and do-release-upgrade should find 16.04).

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