Re: Can't set PowerMizer level via RegistryDwords on drivers newer than 180.60
I've also experienced the same problem, exactly as you described, Cannot set the powermizer level at all through the xorg.conf or through the module settings. I am going to revert back to 180.xx to see if that gets the functionality back.
I don't have any of the problems like you describe like X crashing and such but I like being able to turn down the GPU permanently so the laptop doesn't get so hot when all it is doing is doing some compiz effects.
Any news of whether this is fixed yet?