Okay, hope someone can shed some light on this.
After my upgrade from jaunty to karmic, my screen starts flickering random and I can press CTRL+ALT+F1 and back and it stops flickering. However, the textures looks completely messed up, I have relog for it to become normal again. These flickering are completely random, when I play a movie, gaming, or just surfing the web. So I thought it might be something from the upgrade, so I made a clean install, but the problem didn't go away.
I'm thinking that this could either be a driver issue OR it could be a bug in xorg. So I wonder if any else out there have experience any similar behavior.
I'm having a Nvidia graphic card, Geforce GTX 260 and the nvidia driver 185.18.36.
Any response is appreciated.