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Removing NullCpuPowerManagement With DSDT


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Hi i am trying to remove NullCPUPowerManagement.kext with DSDT fixes.

I tried a lot of thing. No luck yet. When i tried to remove my NullCPUPowerManagement.kext from my Extra folders i am getting K.P. with this error.


panic(cpu 2 caller 0xffffff7f8066020b): "CPU 7 has no HPET assigned to it"@/SourceCache/AppleIntelCPUPowerManagement/AppleIntelCPUPowerManagement-105.13/(i couldnt read this part because of photo sorry)

Debugger called: <panic>

Backtrace (CPU 2), Frame : Return Address

0xffffff8147ba3e50 : 0xffffff8000204b99

0xffffff8147ba3f50 : 0xffffff7f8066020b

0xffffff8147ba3fa0 : 0xffffff80002c72e7

Kernel Extensions in backtrace (with dependencies):




Is there anyway to fix this ? I attached my DSDT and com.apple.boot.plist

Right now there is only three kext in my Extra







Tyan S5396 Motherboard

2 x Intel Xeon 2.5



Any help will be appreciated.

Thanks !


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the dsdtpatcher (fassl)


has the option -newHPET

that generates an HPET "standard", you can try it!


I have seen some cases like his

and unfortunately had no solution


do it with the original DSDT

that its the HEPT was modified

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