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<svg xmlns="http://www.w3.org/2000/svg" aria-labelledby="outbound-link-title" role="img" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><title id="outbound-link-title">(opens new window)</title> <path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Introduction</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/" aria-current="page" class="sidebar-link">Getting Started With ACPI</a></li><li><a href="/Getting-Started-With-ACPI/ssdt-platform.html" class="sidebar-link">Choosing the SSDTs</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Methods</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/ssdt-methods/ssdt-methods.html" class="sidebar-link">How to create SSDTs</a></li><li><section class="sidebar-group is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/ssdt-methods/ssdt-prebuilt.html" class="sidebar-link">Pre-Built SSDTs</a></li><li><a href="/Getting-Started-With-ACPI/ssdt-methods/ssdt-easy.html" class="sidebar-link">SSDTs: The easy way</a></li><li><a href="/Getting-Started-With-ACPI/ssdt-methods/ssdt-long.html" class="sidebar-link">SSDTs: The long way</a></li></ul></section></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Manual</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/Manual/dump.html" class="sidebar-link">Getting a copy of our DSDT</a></li><li><a href="/Getting-Started-With-ACPI/Manual/compile.html" class="sidebar-link">Compiling and decompiling ACPI Tables</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Desktop</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/Desktops/desktop-disable.html" aria-current="page" class="active sidebar-link">Disabling desktop dGPUs</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/Getting-Started-With-ACPI/Desktops/desktop-disable.html#finding-the-acpi-path-of-the-gpu" class="sidebar-link">Finding the ACPI Path of the GPU</a></li><li class="sidebar-sub-header"><a href="/Getting-Started-With-ACPI/Desktops/desktop-disable.html#making-the-ssdt" class="sidebar-link">Making the SSDT</a></li><li class="sidebar-sub-header"><a href="/Getting-Started-With-ACPI/Desktops/desktop-disable.html#now-you-re-ready-to-compile-the-ssdt" class="sidebar-link">Now you're ready to compile the SSDT!</a></li></ul></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Laptop</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/Laptops/backlight.html" class="sidebar-link">Fixing Backlight</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Laptops/trackpad.html" class="sidebar-link">Fixing Trackpad</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Laptops/laptop-disable.html" class="sidebar-link">Disabling laptop dGPUs</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Universal</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/Universal/ec-fix.html" class="sidebar-link">Embedded Controller</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/plug.html" class="sidebar-link">CPU Power Management</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/awac.html" class="sidebar-link">AWAC vs RTC</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/nvram.html" class="sidebar-link">NVRAM PMC</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/rhub.html" class="sidebar-link">USB RHUB</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/imei.html" class="sidebar-link">IMEI</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/smbus.html" class="sidebar-link">Fixing SMBus Support</a></li><li><section class="sidebar-group collapsable is-sub-group depth-1"><p class="sidebar-heading"><span>Methods</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/Getting-Started-With-ACPI/Universal/irq.html" class="sidebar-link">IRQ Fix</a></li><li><a href="/Getting-Started-With-ACPI/Universal/spoof.html" class="sidebar-link">GPU Spoof</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Cleanup</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/cleanup.html" class="sidebar-link">Cleanup</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Misc</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/Getting-Started-With-ACPI/troubleshooting.html" class="sidebar-link">Troubleshooting</a></li><li><a href="/Getting-Started-With-ACPI/CONTRIBUTING.html" class="sidebar-link">Contributing</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-succinct-content content__default"><h1 id="disabling-desktops-unsupported-gpus-ssdt-gpu-disable"><a href="#disabling-desktops-unsupported-gpus-ssdt-gpu-disable" class="header-anchor">#</a> Disabling desktops unsupported GPUs(SSDT-GPU-DISABLE)</h1> <ul><li><a href="#what-this-ssdt-does">What this SSDT does</a></li> <li><a href="#methods-to-make-this-ssdt">Methods to make this SSDT</a> <ul><li><a href="#prebuilts">Prebuilt</a></li> <li><a href="#ssdttime">SSDTTime</a></li> <li><a href="#manual">Manual</a> <ul><li><a href="#finding-the-acpi-path">Finding the ACPI path</a></li> <li><a href="#edits-to-the-sample-ssdt">Edits to the sample SSDT</a></li> <li><a href="#compiling-the-ssdt">Compiling the SSDT</a></li></ul></li></ul></li></ul> <p>So this is mainly needed for GPUs that are not supported in macOS, mainly this will be Nvidia users who wish to pair an AMD GPU for macOS use. While WhateverGreen does support the boot-arg <code>-wegnoegpu</code>, this only works when running on iGPU so for the rest of us we'll need to make an SSDT.</p> <p>So to disable a specific GPU, we need to find a couple things:</p> <ul><li>ACPI Path of the GPU</li> <li><a href="https://github.com/dortania/Getting-Started-With-ACPI/blob/master/extra-files/decompiled/SSDT-GPU-DISABLE.dsl.zip" target="_blank" rel="noopener noreferrer">SSDT-GPU-DISABLE<svg xmlns="http://www.w3.org/2000/svg" aria-labelledby="outbound-link-title" role="img" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><title id="outbound-link-title">(opens new window)</title> <path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li></ul> <h2 id="finding-the-acpi-path-of-the-gpu"><a href="#finding-the-acpi-path-of-the-gpu" class="header-anchor">#</a> Finding the ACPI Path of the GPU</h2> <p>To find the PCI path of a GPU is fairly simple, best way to find it is running Windows:</p> <ul><li>Open Device Manager</li> <li>Select Display Adapters, then right click your GPU and select Properties</li> <li>Under the Details Tab, search for &quot;Location Paths&quot;
<ul><li>Note some GPUs may be hiding under &quot;BIOS device name&quot;</li></ul></li></ul> <p><img src="/Getting-Started-With-ACPI/assets/img/amd.acf5492b.png" alt=""></p> <p><img src="/Getting-Started-With-ACPI/assets/img/nvidia.672e8e16.png" alt="Credit to 1Revenger1 for the image"></p> <p>The second &quot;ACPI&quot; is what we care about:</p> <div class="language- extra-class"><pre class="language-text"><code>ACPI(_SB_)#ACPI(PC02)#ACPI(BR2A)#ACPI(PEGP)#PCI(0000)#PCI(0000)
</code></pre></div><p>Now converting this to an ACPI path is quite simple, remove the <code>#ACPI</code> and <code>#PCI(0000)</code>:</p> <div class="language- extra-class"><pre class="language-text"><code>`_SB_.PC02.BR2A.PEGP
</code></pre></div><p>And voila! We've found our ACPI path, now that we have everything we're ready to get cooking</p> <h2 id="making-the-ssdt"><a href="#making-the-ssdt" class="header-anchor">#</a> Making the SSDT</h2> <p>To start grab our <a href="https://github.com/dortania/Getting-Started-With-ACPI/blob/master/extra-files/decompiled/SSDT-GPU-DISABLE.dsl.zip" target="_blank" rel="noopener noreferrer">SSDT-GPU-DISABLE<svg xmlns="http://www.w3.org/2000/svg" aria-labelledby="outbound-link-title" role="img" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><title id="outbound-link-title">(opens new window)</title> <path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a> and open it up. Here there's a couple things to change:</p> <div class="language- extra-class"><pre class="language-text"><code>External (_SB_.PCI0.PEG0.PEGP, DeviceObj)
Method (_SB.PCI0.PEG0.PEGP._DSM, 4, NotSerialized)
</code></pre></div><p>For our example, we'll change all mentions of :</p> <ul><li><code>PCI0</code> with <code>PC02</code></li> <li><code>PEG0</code> with <code>BR2A</code></li></ul> <p>Hint: If your ACPI path is a bit shorter than the example, this is fine. Just make sure the ACPI paths are correct to your device, some users may also need to adapt <code>_SB_</code> to their path</p> <h2 id="now-you-re-ready-to-compile-the-ssdt"><a href="#now-you-re-ready-to-compile-the-ssdt" class="header-anchor">#</a> <a href="/Getting-Started-With-ACPI/Manual/compile.html">Now you're ready to compile the SSDT!</a></h2></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">7/17/2020, 8:46:53 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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