Re: oS11.3/KDE4: X slows down after a few hours
I am encountering the same exact problem. However, it extends to poor performance in 3d applications as well. While playing a game through WINE, the FPS constantly loops from 80 FPS to 10-15 FPS. It's a good thing I noticed this post, I was beginning to believe it was something I was doing wrong.
I was also using openSUSE 11.3 x86_64 and KDE 4.4.4 with NVIDIA 256.35 on a NVIDIA gtx260. I run 2 monitors as well, both 1920x1080, with TwinView.
I have recently downgraded to openSUSE 11.2, which has solved the problem for the time being.
I'm not sure how to tell if this is a graphics driver problem, or a distribution specific problem. If anyone has any insight on testing that can be done, I'd be willing to test this.