Comment 23 for bug 268434

I can confirm that krandrtray workaround works. I just clicked on KRandRTray.desktop file (located in usr/share/applications/kde4) and a new application "Screen resize & rotate" appeared in the panel. If user will not close this application, it is automatically loaded when the computer is booted.

The downside of this workaround is that the monitor blinks when loading KDE desktop.