Contribute
Register

Lags without NullCPUPowerManagement on High Sierra

Joined
Oct 24, 2015
Messages
7
Motherboard
Gigabyte H110N
CPU
i5 6600
Graphics
HD530
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
 
Joined
Sep 8, 2020
Messages
3
Motherboard
Gigabyte GA-P55a-UD3
CPU
I7 870 2.93Ghz LGA 1156
Graphics
Gigabyte Radeon RX 580 8GB DDR5
Hey, did you get any further on that? I have a Lynnfield problem on high sierra too.
 
Top