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[Guide] Disabling discrete graphics in dual-GPU laptops

clagaw said:
@ladeiko, could I ask you to share your complete EFI folder at this point, please? Thank you very much!
Click to expand...
I am still making some changes to EFI, but after completion i will upload complete EFI to GitHUB
 
Hello, Mr. @RehabMan. I want to disable my Nvidia, my Clover haven't been patched because I'm still confused.
After search using grep command I found this code inside \_SB.PCI0.RP01.PXSX scope in SSDT-4.dsl
Code: 
        Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            If (LEqual (CCHK (Zero), Zero))
            {
                Return (Zero)
            }

            If (LNotEqual (GPRF, One))
            {
                Store (VREG, VGAB)
            }

            HGOF ()
            Return (Zero)
        }
I can't found SPIN method in my SSDT, so I think I can skip step to modify _OFF method.
I found _INI method also in SSDT-4.dsl (same SSDT with _INI method).
So, I must patching SSDT-4 using this patch code, right?
Code: 
into method label _INI parent_label \_SB.PCI0.RP01.PXSX insert
begin
//added to turn nvidia/radeon off\n
_OFF()\n
end;
And to patch _REG in DSDT I must use patch code like this, right?
Code: 
into method label _REG parent_hid PNP0C09 insert
begin
//added to turn nvidia/radeon off\n
If (LAnd(LEqual(Arg0,3),LEqual(Arg1,1)))\n
{\n
    External(\_SB.PCI0.RP01.PXSX._OFF, MethodObj)\n
    \_SB.PCI0.RP01.PXSX._OFF()\n
}\n
end;
And if I facing Sleep Wake Problems I must fix it using patch code like this, right?
Code: 
into method label _PTS code_regex ([\s\S]*) replace_matched
begin
External(\\_SB.PCI0.RP01.PXSX._ON, MethodObj)\n
If (CondRefOf(\\_SB.PCI0.RP01.PXSX._ON)) { \\_SB.PCI0.RP01.PXSX._ON() }\n
%1
end;

into method label _WAK code_regex (Return\s+\(.*) replace_matched
begin
External(\\_SB.PCI0.RP01.PXSX._OFF, MethodObj)\n
If (CondRefOf(\\_SB.PCI0.RP01.PXSX._OFF)) { \\_SB.PCI0.RP01.PXSX._OFF() }\n
%1
end;
I also attach my required attachment below.
Please correct me. Thank you very much.
 

Attachments

  • debug_19072.zip
    2.7 MB · Views: 101
YusufRahadika said:
Hello, Mr. @RehabMan. I want to disable my Nvidia, my Clover haven't been patched because I'm still confused.
After search using grep command I found this code inside \_SB.PCI0.RP01.PXSX scope in SSDT-4.dsl
Code: 
        Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            If (LEqual (CCHK (Zero), Zero))
            {
                Return (Zero)
            }

            If (LNotEqual (GPRF, One))
            {
                Store (VREG, VGAB)
            }

            HGOF ()
            Return (Zero)
        }
I can't found SPIN method in my SSDT, so I think I can skip step to modify _OFF method.
I found _INI method also in SSDT-4.dsl (same SSDT with _INI method).
So, I must patching SSDT-4 using this patch code, right?
Code: 
into method label _INI parent_label \_SB.PCI0.RP01.PXSX insert
begin
//added to turn nvidia/radeon off\n
_OFF()\n
end;
And to patch _REG in DSDT I must use patch code like this, right?
Code: 
into method label _REG parent_hid PNP0C09 insert
begin
//added to turn nvidia/radeon off\n
If (LAnd(LEqual(Arg0,3),LEqual(Arg1,1)))\n
{\n
    External(\_SB.PCI0.RP01.PXSX._OFF, MethodObj)\n
    \_SB.PCI0.RP01.PXSX._OFF()\n
}\n
end;
And if I facing Sleep Wake Problems I must fix it using patch code like this, right?
Code: 
into method label _PTS code_regex ([\s\S]*) replace_matched
begin
External(\\_SB.PCI0.RP01.PXSX._ON, MethodObj)\n
If (CondRefOf(\\_SB.PCI0.RP01.PXSX._ON)) { \\_SB.PCI0.RP01.PXSX._ON() }\n
%1
end;

into method label _WAK code_regex (Return\s+\(.*) replace_matched
begin
External(\\_SB.PCI0.RP01.PXSX._OFF, MethodObj)\n
If (CondRefOf(\\_SB.PCI0.RP01.PXSX._OFF)) { \\_SB.PCI0.RP01.PXSX._OFF() }\n
%1
end;
I also attach my required attachment below.
Please correct me. Thank you very much.
Click to expand...

As per guide, without any EC related code in _OFF, no changes to _OFF or _REG required.
But... _OFF calls HGOF, which does have EC references!

Only apply patches to _PTS/_WAK if necessary.
 
RehabMan said:
As per guide, without any EC related code in _OFF, no changes to _OFF or _REG required.
But... _OFF calls HGOF, which does have EC references!

Only apply patches to _PTS/_WAK if necessary.
Click to expand...
So, I only must to calling _OFF method inside my _INI method,right?
My HGOF method looks like this.
Code: 
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)
        }
Is it need to be patched? What patch must be applied? Thank you very much.
 
Last edited:
YusufRahadika said:
So, I only must to calling _OFF method inside my _INI method,right?
My HGOF method looks like this.
Code: 
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)
        }
Is it need to be patched? What patch must be applied? Thank you very much.
Click to expand...

The EC related code in HGOF (since it is called from _OFF, therefore in the _OFF execution path), must be moved to _REG as described in post #1.
 
@RehabMan,

I need to disable Nvidia Optimus on the Dell E6520.

I have disassembled all files and applied the recommended fixes to DSDT.

A searched revealed that there is only one _INI method and it is in the DSDT.dsl

Code: 
Scope (\_SB.PCI0)
    {
        Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            \EV1 (0x02, 0x00)
            If (ECG4 ())
            {
                GENS (0x1C, 0x01, 0x00)
            }
            Else
            {
                GENS (0x1C, 0x00, 0x00)
            }
        }
    }

The _OFF method can only be found in SSDT-3-NvdTabl.dsl

Code: 
Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            Sleep (0x64)
            Store (PREG, PEGB)
            Sleep (0x64)
            Store (VREG, VGAB)
            Sleep (0x64)
            Store (0x01, LNKM)
            While (LNotEqual (LNKS, 0x00))
            {
                Sleep (0x01)
            }

            Store (0x00, PO34)
            ECS4 (0x00)
        }

The path to the _OFF method is \_SB.PCI0.PEG0.VID.

I'm not sure how to call the _OFF method from _INI?

Should I replace _INI method to read ?

Code: 
Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            Store (Zero, \_SB.PCI0.PEG0.VID._ADR)
            //added to turn nvidia off
            External(\_SB.PCI0.PEG0.VID._OFF, MethodObj)
            _OFF()      
           
        }

Problem is _SB.PCI0.PEG0.VID._ADR "ADR" does not exist?

Do I require Store (Zero, \_SB.PCI0.PEG0.VID._ADR) ? or is the External command sufficient ?
 

Attachments

  • DSDT.dsl
    286.8 KB · Views: 161
  • SSDT-3-NvdTabl.dsl
    50.3 KB · Views: 150
Hello RehabMan,

The _INI method is located on SSDT-5.aml, after I applied Patche Disable from _INI (SSDT) the laptop entered Panic. See attached pictures. The _0FF method is located on SSDT-6.aml, I applied this patch: Method (_INI) {_OFF ()}, the laptop boots, but the graphics card is not disabled.

I would like help solving the problem. Follows requested files.
 

Attachments

  • Files.zip
    10 MB · Views: 99
MikeHoward said:
@RehabMan,

I need to disable Nvidia Optimus on the Dell E6520.

I have disassembled all files and applied the recommended fixes to DSDT.

A searched revealed that there is only one _INI method and it is in the DSDT.dsl

Code: 
Scope (\_SB.PCI0)
    {
        Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            \EV1 (0x02, 0x00)
            If (ECG4 ())
            {
                GENS (0x1C, 0x01, 0x00)
            }
            Else
            {
                GENS (0x1C, 0x00, 0x00)
            }
        }
    }

The _OFF method can only be found in SSDT-3-NvdTabl.dsl

Code: 
Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            Sleep (0x64)
            Store (PREG, PEGB)
            Sleep (0x64)
            Store (VREG, VGAB)
            Sleep (0x64)
            Store (0x01, LNKM)
            While (LNotEqual (LNKS, 0x00))
            {
                Sleep (0x01)
            }

            Store (0x00, PO34)
            ECS4 (0x00)
        }

The path to the _OFF method is \_SB.PCI0.PEG0.VID.

I'm not sure how to call the _OFF method from _INI?

Should I replace _INI method to read ?

Code: 
Method (_INI, 0, NotSerialized)  // _INI: Initialize
        {
            Store (Zero, \_SB.PCI0.PEG0.VID._ADR)
            //added to turn nvidia off
            External(\_SB.PCI0.PEG0.VID._OFF, MethodObj)
            _OFF()     
          
        }

Problem is _SB.PCI0.PEG0.VID._ADR "ADR" does not exist?

Do I require Store (Zero, \_SB.PCI0.PEG0.VID._ADR) ? or is the External command sufficient ?
Click to expand...

You should just add an _INI just before the _OFF:
Code: 
Method(_INI) { _OFF() }

You will want to look at the ECS4 method to see if it accesses the EC (likely). As per guide, all EC related code in _OFF execution path must be moved to _REG.
 
cesarbahia said:
Hello RehabMan,

The _INI method is located on SSDT-5.aml, after I applied Patche Disable from _INI (SSDT) the laptop entered Panic. See attached pictures. The _0FF method is located on SSDT-6.aml, I applied this patch: Method (_INI) {_OFF ()}, the laptop boots, but the graphics card is not disabled.

I would like help solving the problem. Follows requested files.
Click to expand...

"Problem Reporting" files are incomplete (no verbose boot photo attached).
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/

PR files must represent exactly the scenario you are reporting.
 
RehabMan said:
You should just add an _INI just before the _OFF:
Code: 
Method(_INI) { _OFF() }

You will want to look at the ECS4 method to see if it accesses the EC (likely). As per guide, all EC related code in _OFF execution path must be moved to _REG.
Click to expand...

Ok, hang on before I go nuts .... I'm in green fields here

My one and only ECS4 method is in "DSDT.dsl" under root
Code: 
Method (ECS4, 1, NotSerialized)
        {
            ECWB (0x11, Arg0)
        }

It calls ECWB.

Code: 
Method (ECWB, 2, NotSerialized)
        {
            \_SB.PCI0.LPCB.ECDV.ECW1 (Arg0, Arg1)
        }

I don't see how it relates to _SB.PCIO.PEG0.VID (defined in "SSDT-3-NvdTabl.dsl") ?

Also, if I follow the logic,

Step 1: Add a new _INI method in "SSDT-3-NvdTabl.dsl" just before _OFF method. That is easy.
Code: 
Method(_INI) { _OFF() }

Step 2: All EC related code in _OFF execution path must be moved to _REG. This is a bit greek.

How do a know which code is EC ?

Let me guess ... can it be ECS4 as per below ?

Code: 
Method (_OFF, 0, Serialized)  // _OFF: Power Off
        {
            Sleep (0x64)
            Store (PREG, PEGB)
            Sleep (0x64)
            Store (VREG, VGAB)
            Sleep (0x64)
            Store (0x01, LNKM)
            While (LNotEqual (LNKS, 0x00))
            {
                Sleep (0x01)
            }

            Store (0x00, PO34)
            ECS4 (0x00). // to be removed ?
        }


Step 3: Add code from Step 2 to _REG method.

The only _REG method I could find is in "DSDT.dsl". It is part off \_SB.PCIO.LPCB.ECDV

Code: 
Method (_REG, 2, NotSerialized)  // _REG: Region Availability
            {
                If (LAnd (LEqual (Arg0, 0x03), LEqual (Arg1, 0x01)))
                {
                    ECIN ()
                    Store (0x01, \ECRD)
                }
                ECS4 (0x00) // To be added here ?
            }

How will the code be executed to call _OFF method in "SSDT-3-NvdTabl.dsl". We have created an _INI method that call _OFF. However, what is calling _INI ? or is it invoked automatically ?
 

Attachments

  • SSDT-3-NvdTabl.dsl
    50.4 KB · Views: 139
  • DSDT.dsl
    286.8 KB · Views: 173
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