<< Solved >> OpenCore ACPI injection in Windows.

[Yomiro]

I dual boot MacOS and Windows 11 with OpenCore. When I boot into Windows none of the I2C devices are working (screen backlight, trackpad,etc).

I know this is caused by OpenCore since Windows boots perfectly if I skip Opencore and boot directly into Windows.
I am pretty sure it's caused by this section:


Scope (I2C1)
{
Scope (TPD1)
{
If (_OSI ("Darwin"))
{
Name (OSYS, 0x07DC)
}
}
}

I added this so I can get AlpsHID.kext working. Am I missing something so this section doesn't get injected in Windows?

 

[Yomiro]

It was OpenCore ACPI patching causing the issue with OSI renames. Solved

 

[Kingnalz]

Hi, so how you manage to prevent acpi patch apply to other OS?