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Getting Started With ACPI
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Dumping the DSDT
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Prebuilt
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Manual
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Manual
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Disabling laptop dGPUs
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Embedded Controller
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Prebuilt
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SSDTTime
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Manual
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CPU Power Management
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Prebuilt
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SSDTTime
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Manual
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AWAC vs RTC
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Prebuilt
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Manual
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NVRAM PMC
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Prebuilt
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Manual
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USB RHUB
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Prebuilt
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Manual
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IRQ Fix
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GPU Spoof
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Fixing SMBus Support
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Manual
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Cleanup
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Troubleshooting
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Contributing
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<html><head></head><body><blockquote>
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<p><em>Last modified: Thu Jun 18 2020 03:15:12 GMT+0000 (Coordinated Universal Time)</em></p>
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<h1 id="fixing-embedded-controllers-manual"><a name="fixing-embedded-controllers-manual" class="plugin-anchor" href="#fixing-embedded-controllers-manual"><i class="fa fa-link" aria-hidden="true"></i></a>Fixing Embedded Controllers: Manual</h1>
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<ul>
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<li><a href="#fixing-embedded-controllers-manual">Fixing Embedded Controllers: Manual</a><ul>
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<li><a href="#finding-the-acpi-path">Finding the ACPI path</a><ul>
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<li><a href="#dsdt">DSDT</a></li>
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<li><a href="#devicemanager">DeviceManager</a></li>
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</ul>
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</li>
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<li><a href="#edits-to-the-sample-ssdt">Edits to the sample SSDT</a></li>
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<li><a href="#edge-cases">Edge Cases</a><ul>
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<li><a href="#multiple-pnp0c09s-show-up">Multiple PNP0C09's show up</a></li>
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<li><a href="#no-pnp0c09-show-up">No PNP0C09 show up</a></li>
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<li><a href="#pnp0c09-already-named-ec">PNP0C09 already named <code>EC</code></a></li>
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<li><a href="#pnp0c09-already-has-an-_sta-method">PNP0C09 already has an <code>_STA</code> method</a></li>
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</ul>
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</li>
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<li><a href="#compiling-the-ssdt">Compiling the SSDT</a></li>
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<li><a href="#wrapping-up">Wrapping up</a></li>
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</ul>
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</li>
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</ul>
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<p>TO-DO:</p>
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<ul>
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<li>Finish Edge cases and sample SSDT edits</li>
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</ul>
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<h2 id="finding-the-acpi-path"><a name="finding-the-acpi-path" class="plugin-anchor" href="#finding-the-acpi-path"><i class="fa fa-link" aria-hidden="true"></i></a>Finding the ACPI path</h2>
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<p>To find the ACPI pathing, you have 2 methods:</p>
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<ul>
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<li><a href="#DSDT">DSDT</a></li>
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<li><a href="#devicemanager">DeviceManager</a></li>
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</ul>
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<h3 id="dsdt"><a name="dsdt" class="plugin-anchor" href="#dsdt"><i class="fa fa-link" aria-hidden="true"></i></a>DSDT</h3>
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<p>Finding the ACPI pathing is quite easy actually, first open your decompiled DSDT you got from <a href="../../Manual/dump.html">Dumping the DSDT</a> and <a href="../../Manual/compile.html">Decompiling and Compiling</a> with either maciASL(if in macOS) or any other text editor if in Windows or Linux(VSCode has an <a href="https://marketplace.visualstudio.com/items?itemName=Thog.vscode-asl" target="_blank">ACPI extension</a> that can also help).</p>
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<p>Next, search for <code>PNP0C09</code>. You should get something similar:</p>
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<p><img src="../../images/Desktops/pnp.png" alt=""></p>
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<p>From the above example we see 2 main things:</p>
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<ul>
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<li>Name of our embedded controller<ul>
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<li>In this case being <code>EC0</code></li>
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</ul>
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</li>
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<li>Pathing of our embedded controller<ul>
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<li><code>PC00.LPC0</code></li>
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</ul>
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</li>
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</ul>
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<p>But now we get into edge case territory, what fun!</p>
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<p>The main ones to check for are:</p>
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<ul>
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<li><a href="#fixing-embedded-controllers-manual">Fixing Embedded Controllers: Manual</a><ul>
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<li><a href="#finding-the-acpi-path">Finding the ACPI path</a><ul>
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<li><a href="#dsdt">DSDT</a></li>
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<li><a href="#devicemanager">DeviceManager</a></li>
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</ul>
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</li>
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<li><a href="#edits-to-the-sample-ssdt">Edits to the sample SSDT</a></li>
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<li><a href="#edge-cases">Edge Cases</a><ul>
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<li><a href="#multiple-pnp0c09s-show-up">Multiple PNP0C09's show up</a></li>
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<li><a href="#no-pnp0c09-show-up">No PNP0C09 show up</a></li>
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<li><a href="#pnp0c09-already-named-ec">PNP0C09 already named <code>EC</code></a></li>
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<li><a href="#pnp0c09-already-has-an-_sta-method">PNP0C09 already has an <code>_STA</code> method</a></li>
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</ul>
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</li>
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<li><a href="#compiling-the-ssdt">Compiling the SSDT</a></li>
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<li><a href="#wrapping-up">Wrapping up</a></li>
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</ul>
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</li>
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</ul>
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<p>If none of the above apply to you, you're ready for the next section:</p>
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<h3 id="devicemanager"><a name="devicemanager" class="plugin-anchor" href="#devicemanager"><i class="fa fa-link" aria-hidden="true"></i></a>DeviceManager</h3>
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<p>If you already have Windows installed on this machine, finding the EC pathing is fairly easy.</p>
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<p>Start by opening up Device Manager in Windows and looking for a device named <code>Embedded Controller</code>. Once found, click on it and select the <code>BIOS device Name</code> entry. You should get something like this:</p>
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<p><img src="../../images/Desktops/ec.png" alt=""></p>
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<p>From the above, we can see that our pathing is <code>SB.PC00.LPC0.EC0</code></p>
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<p>Now with the pathing, you can head here: <a href="#edits-to-the-sample-ssdt">Edits to the sample SSDT</a></p>
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<h2 id="edits-to-the-sample-ssdt"><a name="edits-to-the-sample-ssdt" class="plugin-anchor" href="#edits-to-the-sample-ssdt"><i class="fa fa-link" aria-hidden="true"></i></a>Edits to the sample SSDT</h2>
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<p>Now that we have our ACPI path, lets grab our SSDT and get to work:</p>
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<ul>
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<li><a href="https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-EC-USBX.dsl" target="_blank">SSDT-EC-USBX</a><ul>
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<li>For Skylake and newer and all AMD systems</li>
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</ul>
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</li>
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<li><a href="https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-EC.dsl" target="_blank">SSDT-EC</a><ul>
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<li>For Broadwell and older</li>
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</ul>
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</li>
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</ul>
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<p>Now when opening this SSDT, you'll notice a few things. Mainly:</p>
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<ul>
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<li>Some code is commented out<ul>
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<li>This is code for disabling our EC</li>
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<li>Laptops users <strong>SHOULD NOT</strong> uncomment this</li>
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</ul>
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</li>
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<li>There's a new EC called <code>Device (EC)</code><ul>
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<li><strong>DO NOT RENAME THIS</strong>, this will be the EC we give to macOS</li>
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</ul>
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</li>
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</ul>
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<p><strong>Before</strong>:</p>
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<pre><code>External (_SB_.PCI0.LPCB, DeviceObj) <- Rename this
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Scope (_SB.PCI0.LPCB) <- Rename this
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</code></pre><p><img src="../../images/Desktops/ssdt-before.png" alt=""></p>
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<p>Following the example pathing we found, the SSDT should look something like this:</p>
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<p><strong>After</strong>:</p>
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<pre><code>External (_SB_.PC00.LPC0, DeviceObj) <- Renamed
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Scope (_SB.PC00.LPC0) <- Renamed
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</code></pre><p><img src="../../images/Desktops/ssdt-after.png" alt=""></p>
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<h2 id="edge-cases"><a name="edge-cases" class="plugin-anchor" href="#edge-cases"><i class="fa fa-link" aria-hidden="true"></i></a>Edge Cases</h2>
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<h3 id="multiple-pnp0c09s-show-up"><a name="multiple-pnp0c09s-show-up" class="plugin-anchor" href="#multiple-pnp0c09s-show-up"><i class="fa fa-link" aria-hidden="true"></i></a>Multiple PNP0C09's show up</h3>
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<p>When multiple PNP0C09 show up, we need to next check for the following properties:</p>
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<ul>
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<li><code>_HID</code> (Hardware ID)</li>
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<li><code>_CRS</code> (Current Resource Settings)</li>
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<li><code>_GPE</code> (General Purpose Events)</li>
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</ul>
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<p>What these signify is whether this PNP0C09 device is real or not, as per the <a href="https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf" target="_blank">ACPI spec</a>. So one's matching the above criteria are the one's we want to disable.</p>
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<ul>
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<li>Note: If _STA shows up as well, you'll need to go here: <a href="#pnp0c09-already-has-an-sta-method">PNP0C09 already has an <code>_STA</code> method</a></li>
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</ul>
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<h3 id="no-pnp0c09-show-up"><a name="no-pnp0c09-show-up" class="plugin-anchor" href="#no-pnp0c09-show-up"><i class="fa fa-link" aria-hidden="true"></i></a>No PNP0C09 show up</h3>
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<p>When this happens, you'll only need to create a "dummy" EC for macOS. You'll still want to find the PCI and LPC pathing for this device. So follow the guide as if you were creating a laptop SSDT-EC.</p>
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<h3 id="pnp0c09-already-named-ec"><a name="pnp0c09-already-named-ec" class="plugin-anchor" href="#pnp0c09-already-named-ec"><i class="fa fa-link" aria-hidden="true"></i></a>PNP0C09 already named <code>EC</code></h3>
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<p>Congrats! No need to create an SSDT-EC! However you will still want USBX if you're skylake or newer.</p>
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<p>Prebuilt can be grabbed here: <a href="https://github.com/dortania/USB-Map-Guide/blob/master/extra-files/SSDT-USBX.aml" target="_blank">SSDT-USBX.aml</a></p>
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<h3 id="pnp0c09-already-has-an-sta-method"><a name="pnp0c09-already-has-an-sta-method" class="plugin-anchor" href="#pnp0c09-already-has-an-sta-method"><i class="fa fa-link" aria-hidden="true"></i></a>PNP0C09 already has an <code>_STA</code> method</h3>
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<p>This is the equivalent of not having an EC as we can't control it with our SSDT-EC, instead we'll need to create a "dummy" EC for macOS. You'll still want to find the PCI and LPC pathing for this device. So follow the guide as if you were creating a laptop SSDT-EC. </p>
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<p>Example of an EC with STA already:</p>
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<p><img src="../../images/Desktops/sta.png" alt="Credit to rottenpants466"></p>
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<h2 id="compiling-the-ssdt"><a name="compiling-the-ssdt" class="plugin-anchor" href="#compiling-the-ssdt"><i class="fa fa-link" aria-hidden="true"></i></a>Compiling the SSDT</h2>
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<p> With the SSDT done, you're now <a href="../../Manual/compile.html">ready to compile the SSDT!</a></p>
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<h2 id="wrapping-up"><a name="wrapping-up" class="plugin-anchor" href="#wrapping-up"><i class="fa fa-link" aria-hidden="true"></i></a>Wrapping up</h2>
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<p>Once you're done making your SSDT, either head to the next page to finish the rest of the SSDTs or head here if you're ready to warp up:</p>
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<ul>
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<li><a href="../../cleanup.html"><strong>Cleanup</strong></a></li>
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</ul>
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