[Bug 1930369] Re: Kubuntu 20.10 does not offer release upgrade to 21.04

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better

The upgrade is not currently open, to avoid systems upgrading and
failing to boot post-upgrade due to bug.

If you read the release notes - 
Kubuntu 21.04 release notes - https://wiki.ubuntu.com/HirsuteHippo/ReleaseNotes/Kubuntu
and especially the main release notes
Ubuntu 21.04 release notes - https://discourse.ubuntu.com/t/hirsute-hippo-release-notes/19221

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."

This applies to all flavors including Kubuntu.

I'll refer you to a couple of askubuntu answers I wrote

- https://askubuntu.com/questions/1333226/how-can-i-update-to-ubuntu-21-04/1333229#1333229
- https://askubuntu.com/questions/1338429/ubuntu-21-04-update-available-then-disappears/1338851#1338851

You'll note the upgrades look in the file located at
https://changelogs.ubuntu.com/meta-release which currently does not have
the 20.10 upgrade to 21.04 as open; thus the upgrade should not work
unless forced (if forced it'll use https://changelogs.ubuntu.com/meta-
release-development instead).

I suggest you seek out support for help. eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://ubuntuforums.org, or for more support options please look at
https://discourse.ubuntu.com/t/community-support/709

I've marked this bug incomplete; if you believe I'm in error, please
leave a comment explaining why, and you can change the status back to
"New".

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1930369

Title:
  Kubuntu 20.10 does not offer release upgrade to 21.04

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete

Bug description:
  I tried to upgrade to 21.04 release according to documentation, but the upgrader claims there is no release to be upgraded to:
  ```
  root at peltan:/home/peltan# pkexec do-release-upgrade -m desktop -f DistUpgradeViewKDE
  Checking for a new Ubuntu release
  No new release found.
  root at peltan:/home/peltan# do-release-upgrade -m desktop
  Checking for a new Ubuntu release
  No new release found.
  root at peltan:/home/peltan# cat /etc/issue
  Ubuntu 20.10 \n \l

  root at peltan:/home/peltan# 
  ```

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