Lags without NullCPUPowerManagement on High Sierra

[dmzkrsk]

I just installed High Sierra on my P55-US3L 1.0, i5 750 and GT 640
All went well but SpeedStep didn't work

I read some posts and:
- deleted NullCPUPowerManagement.kext from EFI partition
- Enabled "Drop OEM"
- Enabled "Generate PStates"
- Enabled "Generate CStates"

Rebooted and:
- Animations became laggy and choppy (i.e. Dock, Launchpad, HWMonitor popup, Firefox scrolling)
- Sleep stopped to work (wakes up immediatly)
- HWMonitor show my multiplier switches between x9 and x20

I moved NullCPUPowerManagement.kext back (without disabling Clover SSDT management):
- Animation works fine
- Sleep works
- HWMonitor always shows x20

I also tries SSDT generation script, but it doesn't support Old Lynnfield CPUs

Actually I'm fine without SpeedTest, but I'd like to solve it for educational purposes

 

[luizfreitag]

Hey, did you get any further on that? I have a Lynnfield problem on high sierra too.