[Bug 1982055] Re: Ubuntu 21.04 is un-upgradeable

[Chris Guiver]

EOL upgrades are documented at
https://help.ubuntu.com/community/EOLUpgrades, but non QA-tested or
unsupported upgrades should be avoided, esp. on data-critical systems.

The use of year.month release names (eg. 20.10 tells you 2020-October
release) allows calculating EOL pretty easy (add 9 months to October &
you have EOL; add a further 6 months & you have the closing window for
the release-upgrade process just from 20.10).

The release-upgrade you wish for is unsupported, isn't quality-assurance
tested, and providing a means to do something that is unsupported & not
quality tested to me makes little sense, as it makes it easier for
people to risk loosing data using unsupported upgrade paths.

FYI:  If a user was using Ubuntu 20.04 LTS, then can release-upgrade to
the next supported release of Ubuntu; be it 20.10/21.04/21.10 (whilst
supported), but for non-LTS users the next release is the only
supported/QA-tested path.

FYI:  I'm not a Canonical employee.

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https://bugs.launchpad.net/bugs/1982055

Title:
  Ubuntu 21.04 is un-upgradeable

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

Bug description:
  Related: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-
  upgrader/+bug/1981939

  Any existing U21.04 machines are currently dead in the water, as there
  appears to be no way at all to upgrade them to 21.10 and then to
  22.04.

  For some reason 'do-release-upgrade' is trying to take them directly
  from 21.04 to 22.04 - is there some typo/regexp issue somewhere where
  it's thinking it's trying to move from 20.04 to 22.04?

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