I'd say it's a bug. The kubuntu-desktop package installs kscreensaver but not kscreensaver-xsavers, rendering kscreensaver useless.
-- xscreensavers(-gl) are installed by default but kscreensaver-xsavers is not https://launchpad.net/bugs/44631 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
