You can "enable" encryption and then not provide a passphrase for the disk, in which case Calamares will do an unencrypted installation

[Aaron Rainbolt]

Steps to reproduce:

1. Boot the Lubuntu Lunar Final ISO.
2. Begin the installation process.
3. When you get to the partitioning screen, check the "Encrypt system" checkbox but do not provide a passphrase.
4. Finish the installation process.

Expected result: You should not be able to proceed past the partitioning screen without either providing an encryption passphrase or unchecking the "Encrypt system" checkbox.

Actual result: You are allowed to proceed past the partitioning screen even with "Encrypt system" checked and no passphrase provided. The installed system will be entirely unencrypted (as opposed to being encrypted with a blank passphrase).

Additional info: Calamares *does* show a great big warning sign over on the right-hand side of the window until you input a passphrase, so the user does have some warning that things won't go as they may expect if they do this.

Personally, I believe this is entirely a UX issue, as the user is given a warning, there's no "additional consequences" resulting from installing this way that I can see (unlike the problem with a missing user password which could cause XScreenSaver problems), and a user who enables disk encryption ought to realize that they need to provide a passphrase for the encryption to actually be any good. If a user actually does accidentally install their system without encryption, they should notice this when their system doesn't prompt them for a disk passphrase, and will have ample opportunity to reinstall Lubuntu correctly.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
https://iso.qa.ubuntu.com/qatracker/reports/bugs/2016828

[Chris Guiver (guiverc)]

I wonder if this is worth a write up on the Lubuntu discourse (in documentation); though that's likely 'overkill'.

I suspect its the result of a (calamares) developer, and given the reported 'great big' warning Aaron reports, I suspect its a reasonable decision (but hey I was a cobol programmer; so from a different time).

Added to the issue tracker (https://discourse.lubuntu.me/t/lubuntu-lunar-lobster-23-04-issue-tracker/4085/5) so we've covered it somewhere; as I don't think it's worth even noting in release notes (though that would be reasonable too).

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Leó Kolbeinsson (leok)]

This also present in Lubuntu Mantic daily ISO dated 18-09-2023

[Simon Quigley (tsimonq2)]

There is now UX preventing this from happening.