I’ve got a very strange problem. Recently I installed KDE 4.2 from the KDE4:Factory repository. I have the Nvidia 6600GT video card and Nvidia’s drivers for it (version 180.29). When I log into KDE4 session all 3D applications work like there is no video card driver (extremely slow). glxgears gives ~2fps only! While in xfce4 it gives hundreds of fps (~800 with maximized window). KDE allows to turn desktop effects on and they work (not very smooth though). All other opengl applications are unusable. I have the same KDE packages installed on another machine with some integrated video card (intel?) and there’s no such problem. Can someone tell me, what the hell is going on?
No! I installed the driver a long time ago, it worked and it works now (the driver itself). But every opengl application is very slow, when KDE is running. When running xfce for example, there’s no such effect.
PS: sorry for the emotions, I guess I didn’t explained the situation clear enough (english is not my native language).
I don’t have a definitive answer to this problem, but some answers to these questions may yield clues or enable others to help. Are you using compiz or kwin window manager? What version of KDE 4 are you using?
FYI, I have an ATI graphics chipset with fglrx driver installed, and I find KDE 4.2 with compiz sluggish. I have reverted to kwin.
I use kwin. KDE version is 4.2.1 (from KDE:Factory repository), qt 4.4.3 (4.5.0 had some problems with non-latin characters in file paths, when I tried it a week ago). The same packages on another machine work just fine. The only difference is a video adapter.