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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?

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    Follow the steps in this reference – 24601 Apr 22 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 at 5:46
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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 at 6:01
  • I DO NOT RECOMMEND IT! But you do you, I guess... – Jeff Apr 28 at 17:29
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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.

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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 at 20:22
  • @Smeterlink Someone there said their Thinkpad was affected as well – Peterson Silva Apr 25 at 17:32
  • Easiest way to check if one is using EFI (and which version)? – elect Apr 26 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) (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 at 21:55
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    @TJJ this issue doesn't relate to focal (20.04) to groovy (20.10) so given you have a different issue & question, you should ask your own question. I'd also not comment/suggest anything for WSL systems as I'm not experienced with them. – guiverc May 1 at 8:04

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