Several people have reported various different ways to eliminate the "active mouse pointer freeze," but so far no one has determined exactly what is causing the issue. I personally have experienced it with 6629 through 7174; others claim that 6629 is fine while only the 7xxx drivers are problematic.
Anyways, the various things that you can toggle to try to eliminate the problem include:
- Composite (this is problematic anyways, and should be disabled).
- RenderAccel (I don't notice much of a difference whether it's enabled or not).
- GW-Write Mask AGP Request (or something along those lines, if it's not missing entirely) in the System BIOS configuration. Enabling it seems to reduce AGP bandwidth somewhat.
- APIC. I don't recommend disabling this, personally: most modern mobos (even uniprocessor) support IO-APIC, a drastically superior way of providing and assigning IRQs. If your board does support IO-APIC, then disabling APIC support entirely probably impacts performance in a negative way.
Also, overclocking might be a factor as well, but AFAIK no one has mentioned it.