Originally Posted by schuay
Added the nvidia-bug-report output, I'm afraid it won't be very helpful.
A good way to trigger this seems to be running WoW. It does happen in other circumstances (no games, only "normal" non graphics intensive apps) but it's way more frequent and severe like this.
In my case, this seems to be triggered by compositing. There is always some sort of activity on the screen when the freezes occur.
I am not sure if it is related to this issue, but if I were to run Runescape in my web browser and leave it running in either a foreground or background tab, xorg-server becomes very laggy and kwin will eventually kill compositing citing slowness being detected. This has been an issue since version 1.7.x when I started using Linux. The recent freezes could be a more extreme case of this. They have been an issue since the upgrade to xorg-server 1.9.x.