Re: kernel page fault on modprobe of 9746's nvidia.ko
You originally reported that just modprobing the nvidia kernel module resulted in an immediate crash. You now seem to be stating that the system is hanging after some period of time, so that sounds like a different problem altogether.
Does this new problem persist if you're not using the Composite extension and/or set RenderAccel to false in xorg.conf ?
If you set NvAGP to 0 in xorg.conf does that have any impact?