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[Guide] Disabling discrete graphics in dual-GPU laptops

Try setting OMPR=3 in _INI, as in:
Code:
        Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            OMPR=3
            _PS3 ()
        }

Hi again.

Got the below two compilation errors :

02/12/18, 10:52:20 PM, iASLNwwaKW.dsl(14497) : Error 4096 - syntax error, unexpected PARSEOP_INTEGER, expecting '('
02/12/18, 10:52:20 PM, iASLNwwaKW.dsl(14815) : Warning 1099 - Unknown reserved name (_WDG)

EDIT:

I changed the code to :

Code:
Method (_INI, 0, NotSerialized)
        {
            Store (0x03, OMPR)
            _PS3 ()
        }

The GPU does not show up in System Report anymore. Does that mean its off ?
 
Last edited:
Hi again.

Got the below two compilation errors :

02/12/18, 10:52:20 PM, iASLNwwaKW.dsl(14497) : Error 4096 - syntax error, unexpected PARSEOP_INTEGER, expecting '('
02/12/18, 10:52:20 PM, iASLNwwaKW.dsl(14815) : Warning 1099 - Unknown reserved name (_WDG)

EDIT:

I changed the code to :

Code:
Method (_INI, 0, NotSerialized)
        {
            Store (0x03, OMPR)
            _PS3 ()
        }

You are clearly using the wrong version of ACPI/ or wrong MaciASL.
Must use ACPI 6.2a as per guide:
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/

The GPU does not show up in System Report anymore. Does that mean its off ?

Not possible to verify without problem reporting files. You neglected to attach any.
 
I did everything as a guide, how to check Nvidia is turn off, or not?
 

Attachments

  • debug_26054.zip
    3.6 MB · Views: 138
I did everything as a guide, how to check Nvidia is turn off, or not?

Compare ioreg at PCI0->RP01 tree and you'll see the obvious difference.
 
Compare ioreg at PCI0->RP01 tree and you'll see the obvious difference.
How to compare it? I'm not sure i understand you.
 
How to compare it? I'm not sure i understand you.

Capture ioreg without patch.
Capture ioreg with patch.
Load both.
Arrange Windows side-by-side.
Navigate in both to PCI0->RP01 tree.
Compare with your eyes and brain.
 
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