Hans Ecke wrote: >> What is your graphics cards and what driver do you use for it? > > GeForce 7600 GS, using proprietary nvidia driver. > > On another machine I'm using GeForce 7800 GTX, same driver, with no > problem. > > FWIW, I seriously doubt its a graphics card issue. Or a hardware issue > in general. You'd be surprised. Is desktop-effects or compositing enabled? Have you tried reproducing without nvidia driver and/or using vesa driver? -- Rex