the cpus=2 flag doesn't always work for me. I had my computer running on it last night downloading off newsgroups, and when I woke up my power center had shut everything down like there was a spike... then I rebooted in cpus=2 and bug was there, then booted into cpus=1 and bug is there as well.. WTF!!! So it seems whatever is going on is left in some sort of memory inside osx. Is there anything I can reset on boot that might control this?

[UPDATE] I remade dsdt.aml from inside of snow, rebooted into cpus=1 and mouse bug was gone. In the instructions of the dsdt patcher it said it would make it so I could boot with then removed AppleRTC.kext & AppleCPUPowerManagement.kext running (no disabler), but when I tried that I got kernel panic at boot. I then removed AppleRTC.kext as well as put NullCPUPowerManagement.kext back into /Extra/Extensions
So I booted into cpus=1, no bug, yet system info says 2 cores, why?

THIS BELOW IS WITH CPUS=1 !!!! Why does it say 2 cores? Are both cores being used?

Hardware Overview:

Model Name: Mac Pro
Model Identifier: MacPro2,1
Processor Speed: 2.08 GHz
Number Of Processors: 1
Total Number Of Cores: 2
Memory: 2 GB
Bus Speed: 800 MHz
Boot ROM Version: MP21.005C.B01
SMC Version (system): 1.30f3
Serial Number (system): SOMESRLNMBR
Hardware UUID: 00000000-0000-1000-8000-001346E34902

This stays the same on reboot back into cpus=1. It shows both cores in system properties. Is it possible that it is showing both cores in system properties, but in reality it is not using both cores, how would I check that?
Istat menus shows only 1 processor/core's stats.. wonder where else I could look. maybe it is just reporting 2 cores from before, but in reality the second one is not in use??

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10.6.4 & Win 7
GA-P55M-UD4 f10 Graphics via DSDT ~ i7 860 ~ GTS 250