Ubuntu: Why is “No new release found” when upgrading from a LTS to the next?



Question:

I'm following the upgrade instructions on Ubuntu's website, but on launching the upgrade tool I get this response:

Checking for a new ubuntu release  No new release found  

Am I doing something wrong? Is there a workaround?

Here's my /etc/lsb-release:

DISTRIB_ID=Ubuntu  DISTRIB_RELEASE=12.04  DISTRIB_CODENAME=precise  DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS"  


Solution:1

According to Ubuntu Engineering Foundations team manager Steve Langasek:

Upgrades between LTS releases are not enabled by default until the first point release, 14.04.1, scheduled for July. It is recommended that most LTS users wait until then before upgrading to 14.04.

If you choose to upgrade before then, you can pass the -d option to the upgrade tool, running do-release-upgrade -d or update-manager -d, to upgrade from vanilla 12.04 to 14.04. (-d stand for devel)

This question explains the justification for waiting for the prompt.


Solution:2

If one has no access to a GUI and wants the update on terminal:

  1. Edit the file

    /etc/update-manager/release-upgrades  

    for Prompt to match either normal or lts. (See list below what fits your case, be aware that you can only upgrade an LTS to another LTS version):

    [DEFAULT]  Prompt=normal  
  2. Test correct version is found, run

    do-release-upgrade -c  
  3. Upgrade in case correct version is shown:

    sudo do-release-upgrade -d  

That way I could upgrade a 12.04 to 12.10.

The available Prompt options are:

  • never - Never check for a new release.
  • normal - Check to see if a new release is available. If more than one new release is found, the release upgrader will attempt to upgrade to the release that immediately succeeds the currently-running release.
  • lts - Check to see if a new LTS release is available. The upgrader will attempt to upgrade to the first LTS release available after the currently-running one. Note that this option should not be used if the currently-running release is not itself an LTS release, since in that case the upgrader won't be able to determine if a newer release is available.


Solution:3

sudo do-release-upgrade -d   

Notice the -d at the end.


Solution:4

2 options :

  1. Burn the iso and put it in your drive, it will detect the upgrade automatically

  2. Go in you synaptics options, then Preference > distribution > Always prefer the highest version.

Problem solved ?


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