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<link rel="next" href="awac.html" />
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<ul class="articles">
<li class="chapter " data-level="5.1.1" data-path="../Laptops/backlight-methods/prebuilt.html">
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Prebuilt
</a>
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<li class="chapter " data-level="5.1.2" data-path="../Laptops/backlight-methods/manual.html">
<a href="../Laptops/backlight-methods/manual.html">
Manual
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Prebuilt
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Manual
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SSDTTime
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<li class="chapter " data-level="6.1.3" data-path="ec-methods/manual.html">
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Manual
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SSDTTime
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Manual
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Manual
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<section class="normal markdown-section">
<blockquote>
<p><em>Last modified: Fri May 29 2020 01:27:44 GMT+0000 (Coordinated Universal Time)</em></p>
<p><em>Last modified: Sun May 31 2020 05:55:38 GMT+0000 (Coordinated Universal Time)</em></p>
</blockquote>
<h1 id="fixing-power-management"><a name="fixing-power-management" class="plugin-anchor" href="#fixing-power-management"><i class="fa fa-link" aria-hidden="true"></i></a>Fixing Power Management</h1>
<h2 id="easy-way"><a name="easy-way" class="plugin-anchor" href="#easy-way"><i class="fa fa-link" aria-hidden="true"></i></a>Easy Way</h2>
<p>With CPU Power Management, it&apos;s a simple as taking <a href="https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-PLUG.dsl" target="_blank">SSDT-PLUG</a> provided by Acidanthera and compiling it yourself. You can find a prebuilt of the file here: <a href="https://github.com/dortania/Getting-Started-With-ACPI/blob/master/extra-files/compiled/SSDT-PLUG-DRTNIA.aml" target="_blank">SSDT-PLUG-DRTNIA.aml</a></p>
<h1 id="fixing-power-management-ssdt-plug"><a name="fixing-power-management-ssdt-plug" class="plugin-anchor" href="#fixing-power-management-ssdt-plug"><i class="fa fa-link" aria-hidden="true"></i></a>Fixing Power Management (SSDT-PLUG)</h1>
<ul>
<li>Note: This file has a bit of extra bloat as it includes checks for all common CPU names, if you wish to clean this up, either remove unused names or follow the guide below.</li>
<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></li>
</ul>
<h2 id="long-wayfor-those-who-want-to-learn"><a name="long-wayfor-those-who-want-to-learn" class="plugin-anchor" href="#long-wayfor-those-who-want-to-learn"><i class="fa fa-link" aria-hidden="true"></i></a>Long Way(For those who want to learn)</h2>
<p>CPU naming is fairly easy to figure out as well, open your decompiled DSDT and search for <code>Processor</code>. This should give you a result like this:</p>
<p><img src="../images/Universal/plug-md/processor.png" alt=""></p>
<p>As we can see, the first processor in our list is <code>PR00</code>. This is what we&apos;ll be applying the <code>plugin-type=1</code> property too. Now grab <a href="https://github.com/dortania/Getting-Started-With-ACPI/blob/master/extra-files/decompiled/SSDT-PLUG.dsl.zip" target="_blank">SSDT-PLUG</a> and replace the default <code>CPU0</code> with our <code>PR00</code>. There&apos;s a couple things to note:</p>
<h2 id="what-this-ssdt-does"><a name="what-this-ssdt-does" class="plugin-anchor" href="#what-this-ssdt-does"><i class="fa fa-link" aria-hidden="true"></i></a>What this SSDT does</h2>
<p>The purpose of SSDT-PLUG is to allow the kernel&apos;s XCPM(XNU&apos;s CPU Power Management) to manage our CPU&apos;s power management. It&apos;s pretty self explanatory why you&apos;d want this.</p>
<p><strong>Note</strong>: SSDT-PLUG is only compatible with Intel&apos;s Haswell and newer CPUs, Sandy Bridge and Ivy Bridge will need to follow the <a href="https://dortania.github.io/OpenCore-Desktop-Guide/post-install/pm.html" target="_blank">ssdtPRgen method</a>(in post-install) while AMD users should not use this(unless attempting to attach AGPM which is outside the scope of Dortania&apos;s guides)</p>
<h2 id="methods-to-make-this-ssdt"><a name="methods-to-make-this-ssdt" class="plugin-anchor" href="#methods-to-make-this-ssdt"><i class="fa fa-link" aria-hidden="true"></i></a>Methods to make this SSDT</h2>
<p>For SSDT-PLUG, there are 3 methods you can choose from:</p>
<ul>
<li>There&apos;s 2 mentions of CPU0 to change</li>
<li>The <code>PR</code> path may need to be changed, in our example we can see that our <code>PR00</code> has <code>SB</code> in front.</li>
<li><a href="plug-methods/prebuilt.html">Prebuilt</a></li>
<li><a href="plug-methods/ssdttime.html">SSDTTime</a><ul>
<li>Note this method does not support <strong>servers</strong> or <strong>HEDT systems</strong></li>
</ul>
<p>So in our final example, we&apos;d have <code>_SB_.PR00</code> and <code>\_SB.PR00</code></p>
<ul>
<li><strong>Note</strong>: If you&apos;re having issues, see the <a href="https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-PLUG.dsl" target="_blank">SSDT-PLUG</a> provided by Acidanthera for example on what other ACPI paths may look like.</li>
</li>
<li><a href="plug-methods/manual.html">Manual</a></li>
</ul>
<p>There are also some edge cases with <code>Processor</code>, specifically on HEDT series like X79, X99 and X299. This edge case is that the ACPI path is much longer and not so obvious:</p>
<p><img src="../images/Universal/plug-md/processor-2.png" alt=""></p>
<p>If we then search for instances of <code>CP00</code> we find that it&apos;s ACPI path is <code>SB.SCK0.CP00</code>:</p>
<p><img src="../images/Universal/plug-md/cp00.png" alt=""></p>
<p>So for this X299 board, we&apos;d change <code>\_PR.CPU0</code> with <code>\_SB.SCK0.CP00</code> and <code>External (_PR_.CPU0, ProcessorObj)</code> with <code>External (_SB_.SCK0.CP00, ProcessorObj)</code></p>
<pre><code class="lang-text">External (_PR_.CPU0, ProcessorObj) &lt;- Rename this
Scope (\_PR.CPU0) &lt;- Rename this
{
Method (DTGP, 5, NotSerialized)
{
...
}
</code></pre>
<p><img src="../images/Universal/plug-md/plug-bios.png" alt="">
<img src="../images/Universal/plug-md/plug-x299.png" alt=""></p>
<p>For those having issues, you can also check <code>Device Manager -&gt; CPU -&gt; BIOS device Name</code></p>
<p><strong>Note</strong>: X299 may report CP10 or higher for the CPU, when this happens use CP00 instead. This issue is due to weird numeration on Windows&apos; side</p>
<h2 id="now-youre-ready-to-compile-the-ssdt"><a name="now-youre-ready-to-compile-the-ssdt" class="plugin-anchor" href="#now-youre-ready-to-compile-the-ssdt"><i class="fa fa-link" aria-hidden="true"></i></a><a href="../Manual/compile.html">Now you&apos;re ready to compile the SSDT!</a></h2>
</section>
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