Disabling an effect in the KCM does disable it at runtime, but in the next session, it comes back enabled. Specifically, my test cases are the fade effect, the sliding popups effect and the minimize and maximize animation effects. Reproducible: Always
Created attachment 86647 [details] Possible patch Please try this patch
Appears fixed, ship it!
Git commit 220c3caf140ff557796ee75947607e1726a1a60b by Martin Gräßlin. Committed on 15/05/2014 at 15:10. Pushed by graesslin into branch 'master'. [kcmkwin/compositing] Fix storing of PluginEnabled states M +2 -3 kcmkwin/kwincompositing/model.cpp http://commits.kde.org/kwin/220c3caf140ff557796ee75947607e1726a1a60b