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Today is the release of Ubuntu 21.04 (Hirsute Hippo). And I can't update to this version.

And also I selected ‘Notify me of a new Ubuntu version’ and changed it to ‘For any new version' on the Updates tab on Software & Update, but it's still not working. In addition, in the terminal, I've written:

sudo do-release-upgrade -c

And output was:

Checking for a new Ubuntu release
No new release found.

What should I do?

Peter Mortensen
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uyivzola
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    Follow the steps in this reference – graham Apr 22 '21 at 17:16
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    Use sudo do-release-upgrade -d ... the upgrade to 21.04 is still "development" (-d), normally until first point-release (21.04,01 in this case) is released. – Soren A Apr 23 '21 at 05:46
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    @SorenA 21.04 is a standard release, no point releases (for LTS releases they exist, and upgrade opens after the .2, but this isn't a LTS). There was a 17.10.1 but that was because of a serious issue that required re-spinning of ISOs and isn't a standard case... – guiverc Apr 23 '21 at 06:01
  • I DO NOT RECOMMEND IT! But you do you, I guess... – Logan Apr 28 '21 at 17:29

1 Answers1

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The release of the ISO has only just occurred; the update from prior releases doesn't get opened until a decision is made on the stability of the new release (watching bug reports etc) & a decision is made to turn the taps (where people are offered the upgrade). I'd recommend being patient and waiting until you're offered the upgrade.

You can use -d to force... but refer to the Ubuntu 21.04 Release Notes where you'll note

Upgrades from Ubuntu 20.10 to Ubuntu 21.04 are not enabled as it is possible for some systems to end up in an unbootable state if they use EFI version 1.10 - bug 1925010. Release upgrades will be enabled once an updated version of shim is available which is compatible with EFI version 1.10.

guiverc
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    The bug #1925010 is for Macbooks, I guess if you are using compatible EFI there's no problem to use sudo update-manager -d – Smeterlink Apr 24 '21 at 20:22
  • @Smeterlink Someone there said their Thinkpad was affected as well – Peterson Silva Apr 25 '21 at 17:32
  • Easiest way to check if one is using EFI (and which version)? – elect Apr 26 '21 at 16:36
  • I would recommend waiting until it's opened officially... I don't know how to check EFI easily, but I'd look for clues in your machine's uEFI setup (BIOS), then maybe look in efibootmgr or use inxi (dmidecode) (http://manpages.ubuntu.com/manpages/groovy/man1/inxi.1.html but as it warns (inxi man page) some hardware may not give accurate responses, I'd look for confirmation before I trusted it. Again I'd suggest waiting. – guiverc Apr 26 '21 at 21:55
  • Yeah, that's my also my strategy (waiting) if I dont have any safety about upgrading. I read that this shouldn't affect modern systems, though.. – elect Apr 27 '21 at 05:04
  • If I use "do-release-upgrade -d" will that change my PPAs to developer channels permanently? Or will it just force the upgrade for this release? – Isaac D. Cohen Apr 28 '21 at 05:21
  • @IsaacD.Cohen by default do-release-upgrade will disable PPA or 3rd party sources. For a clean upgrade it's best to remove all 3rd party packages (ie. ppa-purge), perform the upgrade, then after reboot re-add any 3rd party sources if required; as 3rd party packages are the most common reason for issues during the release-upgrade process – guiverc Apr 28 '21 at 05:48
  • As for the upgrade being offered (briefly) then withdrawn again... please see my answer on https://askubuntu.com/questions/1338429/ubuntu-21-04-update-available-then-disappears (ie. issues with other EFI versions etc) – guiverc May 21 '21 at 22:33