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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
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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-smbus-support"><a name="fixing-smbus-support" class="plugin-anchor" href="#fixing-smbus-support"><i class="fa fa-link" aria-hidden="true"></i></a>Fixing SMBus support</h1>
<h1 id="fixing-smbus-support-ssdt-sbus-mchc"><a name="fixing-smbus-support-ssdt-sbus-mchc" class="plugin-anchor" href="#fixing-smbus-support-ssdt-sbus-mchc"><i class="fa fa-link" aria-hidden="true"></i></a>Fixing SMBus support (SSDT-SBUS-MCHC)</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></li>
</ul>
<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>This section of the guide refers to fixing AppleSMBus support in macOS, what is AppleSMBus? Well this mainly handles the System Management Bus, which has many functions like:</p>
<ul>
<li>AppleSMBusController<ul>
@@ -521,52 +763,11 @@
<li>Other things SMBus does: <a href="https://en.wikipedia.org/wiki/System_Management_Bus" target="_blank">SMBus wiki</a></li>
</ul>
<p>For install purposes, this SSDT isn&apos;t needed but for post-install it&apos;s recommended to put the final touches on your hack.</p>
<p>So to get started, we&apos;ll want to grab our SMBus SSDT:</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>To make this SSDT, you only got 1 method: Doing it manually</p>
<ul>
<li><a href="https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-SBUS-MCHC.dsl" target="_blank">SSDT-SBUS-MCHC.dsl</a></li>
<li><a href="smbus-methods/manual.html">Manual</a></li>
</ul>
<p>So the important parts we care about are:</p>
<pre><code class="lang-text">External (_SB_.PCI0, DeviceObj) &lt;- Rename this
External (_SB_.PCI0.SBUS.BUS0, DeviceObj) &lt;- Rename this
Scope (_SB.PCI0) &lt;- Rename this
{
Device (MCHC)
{
Name (_ADR, Zero) // _ADR: Address
}
}
Device (_SB.PCI0.SBUS.BUS0) &lt;- Rename this
</code></pre>
<p>To find the correct pathing for your devices, grab <a href="https://www.tonymacx86.com/threads/release-hackintool-v3-x-x.254559/" target="_blank">Hackintool</a> (<a href="https://github.com/headkaze/Hackintool" target="_blank">Github link</a>) and head to the PCI tab:</p>
<p><img src="../images/Universal/smbus-md/pci.png" alt="">
Look for the SMBus device under Subclass, then look beside and you&apos;ll see the ACPI path(under IOReg Name). To convert , omit <code>@...</code></p>
<ul>
<li><code>/PC00@0/SMBS@1F,4</code> -&gt; <code>PC00.SMBS</code></li>
</ul>
<p>Once finished, it&apos;ll look something like this:</p>
<pre><code class="lang-text">External (_SB_.PC00, DeviceObj) &lt;- Renamed
External (_SB_.PC00.SMBS.BUS0, DeviceObj) &lt;- Renamed
Scope (_SB.PC00)
{
Device (MCHC)
{
Name (_ADR, Zero) // _ADR: Address
}
}
Device (_SB.PC00.SMBS.BUS0) &lt;- Renamed
</code></pre>
<p><img src="../images/Universal/smbus-md/smbus.png" alt=""></p>
<p>For those having issues, you can also check Device Manager -&gt; CPU -&gt; BIOS device Name</p>
<p><strong>Note</strong>: The MCHC is actually the DRAM controller, similar idea to SMBus for fixing memory reporting</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>
<h2 id="verify-its-working"><a name="verify-its-working" class="plugin-anchor" href="#verify-its-working"><i class="fa fa-link" aria-hidden="true"></i></a>Verify it&apos;s working</h2>
<p>To check if the SSDT is working correctly, run the following in terminal:</p>
<pre><code>kextstat | grep -E &quot;AppleSMBusController|AppleSMBusPCI&quot;
</code></pre><p><img src="../images/Universal/smbus-md/verify.png" alt=""></p>
</section>
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</a>
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