Version: 4.2.1 (using KDE 4.2.0) OS: Linux Installed from: Ubuntu Packages I have set up the Translucency effect to make the windows a bit translucent while they are moved, this is hot, especially in combination with wobbly windows. Now my complain: :-) With this setup, just clicking the title-bar of the window, without actually moving it, makes cpu usage of kwin and xorg go high! (To about 60-70% on a 3 year old laptop with free ati driver on jaunty, and to about 40% on a 2 month old laptop with fglrx on intrepid)
Created attachment 31791 [details] Screenshot of problem While taking this screenshot I was actually just clicking and holding the click of the dolphin title-bar.
Problem is actually caused by wobbly windows and it's the common repaint-loop bug. Having translucent windows enabled or disabled doesn't change anything.
Indeed, I just tried to deactivate wobbly and the phenomenon disappears.
Not specific to ATI drivers actually. I can reproduce using my GeForce as well (on trunk r1184315).
situation should have improved with 4.6, but root cause is bug #189999 - therefore duplicate *** This bug has been marked as a duplicate of bug 189999 ***