Nvidia driver

[Justin Smith]

> Ahh!
> Here is a fragment of my loader.conf..
> nvidia_load="YES"
> machdep.disable_mtrrs="1"
> hw.nvidia.registry.ReqAGPRate="1"
> 
> >

Although this fix alloes me to start up the nvidia driver, the machine
still reboots when I run certain apps (openuniverse, for instance) and
at random times otherwise. Since I need this, I'll have to retreat to
stable for a while...