Can't upgrade to Ubuntu MATE 24.04

I have UM running in my two computers: a new Dell laptop and an old Dell pc. No problem in upgrading from UM 23.10 to UM 24.04. I tried many times but no way to do the upgrade in the pc. I end up by getting the following message:

Suggestions?

I would try:

sudo do-release-upgrade -d

the -d I think is for developer edition. It's still considered that for a while and then they will open it up to everyone.

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The upgrade path for a prior LTS does not open until after the release of Ubuntu 24.04.1 LTS, which is still a few months away.

You can view Noble Numbat (24.04) Release Status Tracking - Release - Ubuntu Community Hub to see the status page, and what BLOCKERS exist on upgrades from jammy (ie. 22.04 LTS). They may not all apply to your system, but these will be fixed prior to the upgrade being open.

I, for sure, would read the pitfalls, and try and assess if they will impact you, before reading the docs on the upgrade (eg. NobleUpgrades - Community Help Wiki; link was found in the Ubuntu MATE 24.04 LTS Release notes) as you'll be using an unsupported upgrade path that currently exists for QA/testing purposes only (or those capable of fixing problems themselves).

If you need more, I've written answers at

and note all flavors upgrade at the same time as Ubuntu Desktop/Server, with this process controlled by the Ubuntu Release team (thus my mention of Ubuntu rather than Ubuntu-MATE/Kubuntu/Lubuntu in my links)

Ubuntu 24.04 LTS official announcements said

Users of Ubuntu 23.10 will soon be offered an automatic upgrade to 24.04. Users of 22.04 LTS will be offered the automatic upgrade when 24.04.1 LTS is released, which is scheduled for the 15th of August. For further information about upgrading, see:

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Thank you very much for your detailed explanation. I had already realized it was not worth doing the upgrade right now, but never suspected the consequences could be so damaging. Only hope my laptop will be spared...

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I had to revert back to 22.04. I am a bit of a noob and 24.04 would not boot from grub on the new kernel. I upgraded to 23.10 first then jumped to Numbat. I am going to wait until august

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Welcome @blueshells50 to the community!

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It has been stopped: Why You Shouldn't Upgrade to Ubuntu 24.04 LTS Yet - OMG! Ubuntu