I found a related bug on kde.org, although it was denied. I've suggested what's mentioned here, so we'll see what happens.
** Bug watch added: KDE Bug Tracking System #137029 http://bugs.kde.org/show_bug.cgi?id=137029 ** Also affects: kdebase (upstream) via http://bugs.kde.org/show_bug.cgi?id=137029 Importance: Unknown Status: Unknown -- on logout X should restart if xorg.conf was changed since last X login https://launchpad.net/bugs/27457 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs