Soterlll Posted March 23 Share Posted March 23 Hi! I'm having a problem with DGPU. It's disabled using SSDT and ACPI patching. The issue is: After reboot from MacOS into Windows Nvidia NVS 5200m is not present in Device Manager. How to fix the problem? Specs: Dell Latitude E6530 with A22 Bios i7-3740QM 1366x768 screen 16GB RAM HD 4000 + NVS 5200M(disabled in SSDT-DGPU) Mojave 10.14.6 EFI.rar Link to comment Share on other sites More sharing options...
Administrators Hervé Posted March 23 Administrators Share Posted March 23 If you're using OpenCore that's normal. Only Clover or Chameleon apply ACPI patches at macOS level only by default. Link to comment Share on other sites More sharing options...
Soterlll Posted March 24 Author Share Posted March 24 I'm using Clover. I think the problem dGPU is disabled when i reboot Mac OS. I don't know how to enable it while rebooting. If i use only -wegnoegpu boot arg (disabling patches and SSDT-DGPU) Nvidia card is present in Device manager. Spoiler DefinitionBlock ("", "SSDT", 2, "hack", "DGPU", 0x00000000) { External (_SB_.PCI0.PEG0.VID_._OFF, MethodObj) // 0 Arguments External (_SB_.PCI0.PEG0.VID_._ON_, MethodObj) // 0 Arguments External (ZPTS, MethodObj) // 1 Arguments External (ZWAK, MethodObj) // 1 Arguments Method (EGPU, 0, NotSerialized) { If ((_OSI ("Darwin") && CondRefOf (\_SB.PCI0.PEG0.VID._ON))) { \_SB.PCI0.PEG0.VID._ON () } } Method (DGPU, 0, NotSerialized) { If ((_OSI ("Darwin") && CondRefOf (\_SB.PCI0.PEG0.VID._OFF))) { \_SB.PCI0.PEG0.VID._OFF () } } Device (RMD1) { Name (_HID, "RMD10000") // _HID: Hardware ID Method (_INI, 0, NotSerialized) // _INI: Initialize { If (_OSI ("Darwin")) { DGPU () } } Method (_STA, 0, NotSerialized) // _STA: Status { If (_OSI ("Darwin")) { Return (0x0F) } Return (Zero) } } Method (_PTS, 1, NotSerialized) // _PTS: Prepare To Sleep { If (_OSI ("Darwin")) { EGPU () } ZPTS (Arg0) } Method (_WAK, 1, Serialized) // _WAK: Wake { Local0 = ZWAK (Arg0) If (_OSI ("Darwin")) { DGPU () } Return (Local0) } } Link to comment Share on other sites More sharing options...
Administrators Solution Hervé Posted March 24 Administrators Solution Share Posted March 24 Ok, so dGPU remains disabled on warm reboots from macOS into Windows. There are only a few ways to address this: you opt for the boor arg option rather than the patched ACPI code. you call on your EGPU ACPI code on macOS shutdown to re-enable the dGPU; that should be handled by an event that you need to identify. Maybe one of those EV methods. you power off your laptop when you want to boot Windows. Link to comment Share on other sites More sharing options...
Soterlll Posted March 24 Author Share Posted March 24 Thanks for your help. I'll stick to boot arg solution. Problem is solved. Link to comment Share on other sites More sharing options...
Recommended Posts