/usr/share/kubuntu-default-settings/kf5-settings/kscreenlockerrc is in kubuntu-settings-desktop 1:18.04ubuntu11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | [Daemon]
Autolock=true
Timeout=15
[Greeter]
WallpaperPlugin=org.kde.image
|