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Windows Install Alters Bios - impacts power management and sleep

Joined
Nov 28, 2011
Messages
151
Motherboard
ASUS Prime H370M-PLUS
CPU
i5-8600
Graphics
RX 570
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
Android
Okay, I installed Windows10 so my visiting kid could feed the overwatch addiction and in general I keep a working windows install as well as a LInux install. So, long story short, after installing Windows, sleep no longer worked in my Mojave build.

Upon looking at the BIOS I found that windows had changed it to secure boot mode, and set PCH DMI ASPM to Enabled as well as ASPM to Auto. I returned the BIOS to how I had it before, but the problem persisted.

I had to

sudo rm /Library/Preferences/com.apple.PowerManagement.*

Then reboot for the system to rebuild power management without the windows bios entries...so long story short, installing Windows altered the BIOS, that caused power management settings to automatically change and they had to be cleared out.

I may be wrong as to the cause of the changes to the power management files, but it is fixed regardless.
 
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