Ubiquity kubuntu does not support / partition encryption (dual boot)

[Xavier Gnata]

This bug exists at leat with 19.04, 19.10 and 20.04 beta.

With the ubuntu installer one can click on "do something else" and choose "physical volume for encryption" to create an encrypted partition. The installer nicely ask for the password and creates and then shows /dev/mapper/sdaX_crypt which can eventually be formated/mounted as /. Alongside with a non-encrypted /boot partition the installation works like a charm.

With the kubuntu installer it does not work. If one selects "manual" and then "physical volume for encryption", the installer does not ask for a password and no /dev/mapper/sdaX_crypt is created. Therefore it is not possible to install kubuntu with an encrypted / out of the box. It is possible to install kubuntu on a fully encrypted drive but many users are in dual boot.

Workaround : either create the encrypted partition with the command line before you run the kubuntu installer or install ubuntu and try to apt install kde afterwards.

[Xavier Gnata (xavier-gnata-gmail)]

I would argue that it is a security issue as it will prevent new users (typical dual boot users) from encrypting the data.