Unfortunately, both installers used for Desktop Ubuntu flavors, i.e. subiquity and calamares, are currently able to properly install Ubuntu/Lubuntu/... into an encrypted partition with an LVM inside to allow multiple partitions (e.g. if other file systems are needed for applications like LXD), which is a regression.
In contrast, the old fashion console based installer for Ubuntu server is still able to do it properly.
What is the recommended and official way/workaround to install Ubuntu desktop versions into encrypted partitions with LVM?
Install the server edition, remove cloud-init, and install e.g. lubuntu-desktop?
Anything else needed?
subiquitywhich is the Ubuntu Server installer; both saying it has the problem you're asking to fix; then later asking if using it will resolve the issue? Ubuntu Desktop started using theubuntu-desktop-installerat 23.04, withubiquityoffered as an alternate ISO (legacy installer) for 23.04 & 23.10. FYI: Prior to 23.04 theubuntu-desktop-installerwas named canary installer, howeversubiquityhas been used for Server installs for much longer time. – guiverc Nov 30 '24 at 22:04ubuntu-desktop-installerand notsubiquity, though it does callsubiquitycode for parts of the install process sosubiquitymessages can appear (ie. same backend which is coded to report subiquity) but the Desktop installer is notsubiquity(Theubuntu-desktop-installerwas called canary installer prior for 22.10 & earlier; 21.10/impish being first release with canary available for QA) – guiverc Dec 04 '24 at 00:05