[Guide] Disabling discrete graphics in dual-GPU laptops

[vulgo]

For my computer there is no \_SB.PCI0.LPCB.EC0.SPIN (0x96, Zero) code or similar at _OFF method in SSDT-9.
Does it mean no chance to disable it?

From OP

Now... how to find the SSDT that has _OFF. We can use grep:

In your SSDT-7 you will find \_SB.PCI0.PEG0.PEGP._OFF method

 

[ismozy]

Is it 7? No, I don't think so.
If you say 8. Yes, I already found that code.

Method (_OFF, 0, Serialized)  // _OFF: Power Off
            {
                \_SB.PCI0.PEG0.PEGP.SGOF ()
                Store (Zero, _STA)
            }

But for this code @RehabMan says

If you open SSDT-10.dsl and look for _OFF, you find it is a method inside a PowerResource macro. This is not the _OFF method we want. Open SSDT-11.dsl and look there and you'll find a regular _OFF method, which is what we are looking for.

For my sample SSDT-10 = SSDT-8
SSDT-11 = SSDT-9

You can find the regular one in the origin SSDT_9 like below:

Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            If (LEqual (CTXT, Zero))
            {
                If (LNotEqual (GPRF, One))
                {
                    Store (VGAR, VGAB)
                }

                Store (One, CTXT)
            }

            SGOF ()
        }

As I said before there is no _OFF line.

 

[vulgo]

Is it 7? No, I don't think so.
If you say 8. Yes, I already found that code.

Here it is, in SSDT-7 in the second Scope block

    Scope (\_SB.PCI0.PEG0.PEGP)
    {

    ....

        Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            If (CTXT == Zero)
            {
                If (GPRF != One)
                {
                    VGAB = VGAR /* \_SB_.PCI0.PEG0.PEGP.VGAR */
                }

                CTXT = One
            }

            SGOF ()
        }

    ....

    }

 

[vulgo]

Here it is, in SSDT-7 in the second Scope block

    Scope (\_SB.PCI0.PEG0.PEGP)
    {

    ....

        Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            If (CTXT == Zero)
            {
                If (GPRF != One)
                {
                    VGAB = VGAR /* \_SB_.PCI0.PEG0.PEGP.VGAR */
                }

                CTXT = One
            }

            SGOF ()
        }

    ....

    }

Edit: I misread your post. The code above is the method you want, whichever file it is in is the correct one as you seem to have uploaded 2 folders with differently named SSDTs.

Just follow the rest of the guide if there are no EC calls.

 

[RehabMan]

For my computer there is no \_SB.PCI0.LPCB.EC0.SPIN (0x96, Zero) code or similar at _OFF method in SSDT-9.
Does it mean no chance to disable it?

No.
It just means you won't have to relocate any EC related code.

 

[packrobottom]

I've dumped and dissembled the aml files. OFF and IN are in DSDT.dsl and SSDT-17.dsl I'm lost on how to proceed to patch. Rehab man could you help me?

 

[RehabMan]

I've dumped and dissembled the aml files. OFF and IN are in DSDT.dsl and SSDT-17.dsl I'm lost on how to proceed to patch. Rehab man could you help me?

_OFF is in SSDT-17. It calls HGOF, also in SSDT-17. HGOF has EC references that need to be moved to _REG. _INI is also in SSDT-17. Patch _INI as per guide (to call _OFF). Move EC related code from HGOF to _REG (as per guide).

 

[packrobottom]

ok this is making my head explode. is this correct? I didn't use External because it's all in the same file right?

patch _INI from:

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

To:

Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            Store (Zero, \_SB.PCI0.RP01.PXSX._ADR)
            //added to turn Nvidia discrete graphics off
            (\_SB.PCI0.RP01.PXSX._OFF, MethodOBJ)
            _OFF()
        }

I'm lost on moving moving EC code from HGOF to _REG. there isn't even a _REG when I do a search. everything is in ssdt-17.dsl. The guide doesn't deal with moving code from HGOF to _REG

 

[RehabMan]

ok this is making my head explode. is this correct? I didn't use External because it's all in the same file right?

patch _INI from:

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

To:

Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            Store (Zero, \_SB.PCI0.RP01.PXSX._ADR)
            //added to turn Nvidia discrete graphics off
            (\_SB.PCI0.RP01.PXSX._OFF, MethodOBJ)
            _OFF()
        }

Should be:

        {
            Store (Zero, \_SB.PCI0.RP01.PXSX._ADR)
            //added to turn Nvidia discrete graphics off
            _OFF()
        }

I'm lost on moving moving EC code from HGOF to _REG. there isn't even a _REG when I do a search. everything is in ssdt-17.dsl. The guide doesn't deal with moving code from HGOF to _REG

_REG is found in DSDT.

 

[packrobottom]

ahhh thx ok _INI is patched properly

which code from here is ec related:

Method (HGOF, 0, Serialized)
        {
            If (LEqual (CCHK (Zero), Zero))
            {
                Return (Zero)
            }

            Store (Zero, ONOF)
            Store (LCTL, ELCT)
            Store (One, LNKD)
            While (LNotEqual (LNKS, Zero))
            {
                DDLY (One)
            }

            SGPO (HLRS, One)
            SGPO (PWEN, Zero)
            Store (Zero, \_SB.PCI0.LPCB.EC0.VGAF)
            \_SB.PCI0.LPCB.EC0.SCTB ()
            Return (Zero)
        }

how do I move it to here in dsdt.dsl

 Method (_REG, 2, NotSerialized)  // _REG: Region Availability
            {
                If (LEqual (Arg0, 0x03))
                {
                    Store (Arg1, Local0)
                    If (Local0)
                    {
                        Store (One, ECOK)
                    }
                    Else
                    {
                        Store (Zero, ECOK)
                    }
                }