[Guide] Disabling discrete graphics in dual-GPU laptops

[Steeeeeeve]

Hi, Rehabman.
My device doesn't have an EC, so I followed the thread and add "SSDT-DDGPU.aml" call _OFF from _INI. I can't see my NVIDIA in my ioreg after doing that.

However, I still get a high overall voltage when my CPU only consumes a little. Can you have a look on my troubleshooting files and check that whether I have to do more to completely stop my NVIDIA? Thanks.

 

[RehabMan]

Hi, Rehabman.
My device doesn't have an EC, so I followed the thread and add "SSDT-DDGPU.aml" call _OFF from _INI. I can't see my NVIDIA in my ioreg after doing that.

However, I still get a high overall voltage when my CPU only consumes a little. Can you have a look on my troubleshooting files and check that whether I have to do more to completely stop my NVIDIA? Thanks.

It appears that your SSDT-DDGPU.aml is working to disable Nvidia.
But your profile indicates your laptop has no Nvidia.
If your profile is inaccurate, please fix it as per FAQ:
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/

 

[Tristansor]

Hello, Rehabman.
I read your entire guide in the first post but I am quite confused with the provided example files.

the
grep -l Method.*_OFF *.dsl

command points me to the following files :
DSDT.dsl
SSDT-11-XMCC1701.dsl
SSDT-4-XMCC1701.dsl


I opened them in MACiasl but i am not so sure how to edit them.

Here are the _INI and _OFF methods found in the SSDT-11-XMCC1701.dsl file :

Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            \_SB.PCI0.RP01.PXSX._ADR = Zero
        }

and

Method (_OFF, 0, Serialized)  // _OFF: Power Off
            {
                If ((OSYS != 0x07D9))
                {
                    If ((\_SB.PCI0.RP01.PXSX.TDGC == One))
                    {
                        CreateField (\_SB.PCI0.RP01.PXSX.TGPC, Zero, 0x03, GUPC)
                        If ((ToInteger (GUPC) == One))
                        {
                            \_SB.PCI0.RP01.PXSX.GC6I ()
                            _STA = Zero
                        }
                        ElseIf ((ToInteger (GUPC) == 0x02))
                        {
                            \_SB.PCI0.RP01.PXSX.GC6I ()
                            _STA = Zero
                        }
                    }
                    Else
                    {
                        \_SB.PCI0.RP01.PXSX.HGOF ()
                        _STA = Zero
                    }
                }
            }

Thanks in advance for your help

 

[RehabMan]

Hello, Rehabman.
I read your entire guide in the first post but I am quite confused with the provided example files.

the
grep -l Method.*_OFF *.dsl

command points me to the following files :
DSDT.dsl
SSDT-11-XMCC1701.dsl
SSDT-4-XMCC1701.dsl


I opened them in MACiasl but i am not so sure how to edit them.

Here are the _INI and _OFF methods found in the SSDT-11-XMCC1701.dsl file :

Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            \_SB.PCI0.RP01.PXSX._ADR = Zero
        }

and

Method (_OFF, 0, Serialized)  // _OFF: Power Off
            {
                If ((OSYS != 0x07D9))
                {
                    If ((\_SB.PCI0.RP01.PXSX.TDGC == One))
                    {
                        CreateField (\_SB.PCI0.RP01.PXSX.TGPC, Zero, 0x03, GUPC)
                        If ((ToInteger (GUPC) == One))
                        {
                            \_SB.PCI0.RP01.PXSX.GC6I ()
                            _STA = Zero
                        }
                        ElseIf ((ToInteger (GUPC) == 0x02))
                        {
                            \_SB.PCI0.RP01.PXSX.GC6I ()
                            _STA = Zero
                        }
                    }
                    Else
                    {
                        \_SB.PCI0.RP01.PXSX.HGOF ()
                        _STA = Zero
                    }
                }
            }

Thanks in advance for your help

Nothing unusual there. Although you did forget to use the "-dl" flag when you disassembled.

You should be able to simply call _OFF from _INI (as per post #1), since _OFF (and HGOF) seem to have no EC references.

 

[johnnync21]

how can i resolve sleep and wake intel gpu with hotpach?
The tutorial say that the patching is in dsdt.

 

[pal_kubo]

Hy, can you help me to disable the Nvidia 740m its to complicated for me.

 

[nouatzi]

Hi @RehabMan, I was wondering, is there a way to check if the discrete graphic card is actually disabled ?

 

[RehabMan]

how can i resolve sleep and wake intel gpu with hotpach?
The tutorial say that the patching is in dsdt.

Off-topic.

 

[RehabMan]

Hy, can you help me to disable the Nvidia 740m its to complicated for me.

Read post #1.
Note problem reporting requirements.

 

[RehabMan]

Hi @RehabMan, I was wondering, is there a way to check if the discrete graphic card is actually disabled ?

I would need to see problem reporting files as per post #1.