Comment 1 for bug 278333

I've got a little update on this situation. After a sudden act of despair, I was able to find the causes for this "mysterious" freezes. The up to date nvidia hardware controllers were indeed the cause of this problem. As a last resort, I uninstalled them and the freezes and display distortions were no longer a problem. The downside is that any 3D game and some rendering tools are out of the horizon and even some 2D applications are now slower... but most applications are handled quite nicely. This seems to be a problem for a long time. I was able to find some registers dated of 2006 and not even the new 177 drivers have fixed this issue.
As I said before, if somebody needs to test something, as always I'm available to help on this.