Catalina 10.15.5 usb mouse stuttering and general lag

c3sco

New member
Jun 11, 2020
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I've installed macos catalina 10.15.5 on a Gigabyte B450 Aorus Pro with a Ryzen 5 2600, following dortania's opencore guide.
Everything works but i'm experiencing a general lag, and it's more evident with mouse movements.
I have a nvidia gt 710 and i initially thought that it could be the cause but i'm not sure:
Dortania opencore guide recommend to enable "Above 4G Decoding". If i enable above 4g decoding (removing npci=0x2000 from boot-args) the lag is visible and sleep/wake works. If i disable above 4g decoding (adding npci=0x2000 from boot-args) the lag disappear but sleep/wake doesn't work anymore.

Does anyone experienced something similar?

Sorry for my bad english
 

ejdyksen

New member
Jul 22, 2020
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Also having a similar problem with my X570 board. The cursor jumps occasionally when moving

Try disabling SMCAMDProcessor and AMDRyzenCPUPowerManagement kexts and see if that helps. It seems to have worked for me...
 

Aluveitie

Active member
May 2, 2020
401
101
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Catalina runs very smooth but I have the same mouse cursor lags under Big Sur, disabling low power state from the automatic speed adjustment helped there.