Screen Saver in 13.1 Plasma Desktop

I had been using 12.3, just switched to 13.1. I have an extended desktop using AMD Catalyst software to extend a 3520x1080 desktop over a 1600x900 laptop display and a 1920x1280 VGA LCD display. I can’t find anything in either the Plasma desktop controls or the AMD Catalyst controls to set or vary the screen saver settings. This is especially annoying because the displays revert to basic single-display settings wwhen the screen saver times out. I have no idea where to look for the problem.

I will greatly appreciate any ideas you might have.

“Configure Desktop”->“Display and Monitor”->“Screen Locker”, just where it was in 12.3/KDE4.10.

I cannot help you with the actual problem though. I don’t have and never had a multi-screen setup.
Maybe a kscreen issue? Try to disable it in “Startup and Shutdown”->“Services Management” (“KScreen 2” service).

And have you installed all available updates?
There have been some changes in the screen locker regarding multi-screen support.