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I am trying to install Kubuntu 24.04 with manual partitioning. I have created primary partitions for EFI and boot, and an encrypted partition with logical volumes for swap, root, and home.

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Previously, after this step I just run the Kubuntu installer, manually assigned /dev/mapper/vg0-* partitions for root, home, and swap, as well as the primary partitions for /boot/efi and /boot, and it all worked ok.

But in Kubuntu 24.10 the installer changed, and now I'm not sure what I should do. There are separate dropdown items for the whole disk and for the mounted logical volume, and the installer suggests that I should format the logical volumes to use them, and then tries to delete them for some reason.

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It all ends with this error:

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Is there any way to solve this? Maybe I do not need to manually partition the disk prior to running the installer? Could I achieve what I want just using the dialogs within the installer itself?

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  • 24.10 or 24.04? Another approach is to just run a standard/minimal install and then migrate it over to the structure you actually wanted. Commented May 4, 2024 at 6:53
  • @frostschutz thank you, 24.04 definitely) I'm not sure how to migrate to a new partitioning structure after the installation. Seems to be even more complex and potentially error-prone. I decided to install 23.04 and then upgrade to 24.04. But that's impossible too for now, only new installs are permitted. But hopefully that's a matter of weeks. Commented May 4, 2024 at 12:21
  • 23.04 is EOL, 23.10 should work until July 2024, otherwise 22.04 LTS should continue to work, if you don't mind upgrading after installing. Commented May 13, 2024 at 5:51

2 Answers 2

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I actually found a solution and was able to perform an installation. I created and mounted my luks volumes (with luksOpen), and after that formatted all of them with mkfs / mkswap.

The key to success was to name the luks device (when opening it) to live-WHATEVER, so that it appears under /dev/mapper/live-WHATEVER.

Also, before starting the installation, I run the command while true; do vgchange -ay; done (it should stay running in terminal while the installation is performed).

Not sure if any one of those would be enough, but as a result, my luks partitions were not unmounted during the installation, and I was able to successfully install the system on them.

I found this solution on Calamares github issues, not sure if I'm allowed to post links here, but I hope this attribution is enough.

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  • this solution didn't work for me in Ubuntu: does kubuntu use different installer? Commented Jun 5, 2024 at 15:30
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    @morgwai Kubuntu 24.04 LTS uses the calamares installer (as three flavors use), which yes differs to ubuntu-desktop-installer used by Ubuntu Desktop and in fact most flavors. The calamares installer can use LUKS2 Commented Jul 26, 2024 at 4:19
  • yeap, standard installer completely fail Commented Mar 7 at 16:22
  • it sounds strange, but i can confirm that (after creating the LUKS container and formatting with the desired filesystem) the necessary step is to make them available at /dev/mapper/live-XYZ. - even using /dev/mapper/luks-UUID (like it is done in a default setup) makes Calamares abort the installation. Commented Jun 9 at 21:29
  • This worked for me on the 3rd or 4th try, but i didn't follow the instructions exactly from the beginning. On the attempt that worked, I was careful to 1) use cryptsetup open /dev/nvme0n1p4 live-p16vg to open the volume group (it was created in previous attempts as "p16vg") and run vgchange -ay in a loop in a window before even click "Install". I may not have done that in earlier attempts. Commented Jun 27 at 9:10
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Boot into a live environment, and configure your /boot and LVM/luks or luks/LVM the way you'd like.

Then start the installer and choose your existing partitions.

Sometimes you need to run boot-repair to get a bootable system.

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  • Ubuntu 24.04 has a new installer, which no longer displays existing LUKS/LVM/mdadm, so you can't choose them. You can do it with 22.04 LTS, and then upgrade... Commented May 13, 2024 at 5:49

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