KDE Partition Manager and KPMcore 3.0.0 have been released. Here are some of the new features:

Both LVM on LUKS and LUKS on LVM configurations are now supported.

Creating new LVM Volume Groups, adding or removing LVM Physical Volumes from LVM VG.

Resizing LVM Logical Volumes.

Resizing LVM Physical Volumes even if they belong to LVM Volume Group (used extents will be moved out somewhere else)

Added support for online resize. Not all filesystems support this, e.g. ext4 can only be grown online while btrfs supports both growing and shrinking.

Fixed some crashes, Qt 5.7.1 is also recommended to fix crash (in Qt) on exit.

Better support for sudo. Now KDE Partition Manager declares required environmental variables when kdesu uses sudo (e.g. in Kubuntu or Neon), so the theming is no longer broken. Environmental variables for Wayland are also fixed.

Here is a video demonstrating some of these new LVM capabilities. Note this is done directly from my main system, I’m resizing my encrypted rootfs without using any Live CD.