Hi, I use cube effect to switch between my desktops and it works great. The animation is very fluent and fps is much higher than 25. But here is the thing.

I have for instance two windows with a lot of text (like Firefox, Konqueror, Gvim, Kate...), each window on different desktop. When I want to switch between these two desktops, the animation is unwatchable and fps is very low. The strange thing is, that both windows MUST be focused. When they are not (I unfocus them for example by clicking on the desktop), the animation works normally.

I have usually underclocked my cpu, it is enough for my work and the noise of ventilator is reduced. When I set the frequency to max, the effect works fluently in all cases, so I guess this effect eats a lot of cpu.

However I would be still interested why it works with unfocused windows and with focused doesn't.

For your information, I have KDE 4.4.2, OpenSuse 11.2, Core 2 Duo 2.2GHZ, nVidia 9600m gt (drivers 190.53).

sounds like Bug #226182. Try either to disable animations in Oxygen window decoration or switch to a window decoration which does not use animations (all but Oxygen and Aurorae).

Hey! That was it! I switched to Oxygen, turned off all animations and the problem solved. However I really like my Auroae black decoration so I will have to deside between sacrificing fps and sacrificing eye-candy

It is also possible to disable the animation in Aurorae, but this will also disable on hover animation. Therefore find the decoration configuration file in ~/.kde/share/apps/aurorae/themes/themename/themenamerc and set the setting for Animation to 0.

Thank you, I'll try it.