Originally Posted by zander
@scourge: thanks for the update; I had suspected that this might be the case (that's why I asked if starting something like `glxgears` helped, since that bumps the card into perfomance mode), but it's hard to identify the root cause remotely. I'm not sure why this wasn't a problem on Windows, but it'd be interesting to learn if the hangs continue to reproduce with the upcoming driver release.
My researches showed, that the problem is apparent among Windows users as well, but most of them fix it by adjusting their 2D speeds via CoolBits. Would it be possible to implement clock rate settings in "nvidia-settings"? The only solution to my problem (which I guess affects a lot of people) was to tamper around with a BIOS-editor.