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99 lines
3.5 KiB
Markdown
99 lines
3.5 KiB
Markdown
# Fixing System Clocks: Manual
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* [Determining which SSDT you need](#determining-which-ssdt-you-need)
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* [RTC0 Method](#rtc0-method)
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* [Finding the ACPI path](#finding-the-acpi-path)
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* [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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* [Compiling the SSDT](#compiling-the-ssdt)
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* [Wrapping up](#wrapping-up)
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## Determining which SSDT you need
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* **Note**: X99 and X299 see [here](../awac-methods/manual-hedt.md)
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Finding which SSDT you need is quite easy actually, first open your decompiled DSDT you got from [Dumping the DSDT](/Manual/dump.md) and [Decompiling and Compiling](/Manual/compile.md) with either MaciASL(if in macOS) or any other text editor if in Windows or Linux(VSCode has an [ACPI extension](https://marketplace.visualstudio.com/items?itemName=Thog.vscode-asl) that can also help).
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Next search for `ACPI000E`. You should get something similar:
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The above tells us a few things:
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* We in fact do have an AWAC clock
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* If nothing shows up, you don't need to do anything for AWAC or RTC
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* It can be easily disabled with STAS(if not, you can skip to here: [RTC0 Method](#rtc0-method))
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* `_STA` is the device status, with `Zero` meaning it won't show up
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But to double check, next search for `PNP0B00`:
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And look at that, we can in fact disable our AWAC and enable the RTC! If not skip to here: [RTC0 Method](#rtc0-method)
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Now it's as simple as grabbing [SSDT-AWAC.dsl](https://github.com/acidanthera/OpenCorePkg/tree/master/Docs/AcpiSamples/Source/SSDT-AWAC-DISABLE.dsl) and [compile](#compiling-the-ssdt), no changes needed You can also use the below SSDT to the same effect:
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* [SSDT-AWAC.aml](https://github.com/dortania/Getting-Started-With-ACPI/blob/master/extra-files/compiled/SSDT-AWAC.aml)
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## RTC0 Method
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This method is for those who either don't have a `PNP0B00` device to re-enable or have no easy way(via STAS variable).
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### Finding the ACPI path
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Assuming you've gotten your DSDT already opened from earlier, search for the following:
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* Finding the LowPinCount path:
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* Search `Name (_ADR, 0x001F0000)`
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* Finding the PCI path:
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* Search `PNP0A08` (If multiple show up, use the first one)
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You should get something like the following show up:
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LPC Pathing | PCI Pathing
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:-------------------------:|:-------------------------:
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From the above, we can see we have both `PCI0` and `LPC`. Now we can head to the next stage
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### Edits to the sample SSDT
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Now that we have our ACPI path, lets grab our SSDT and get to work:
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* [SSDT-RTC0.dsl](https://github.com/acidanthera/OpenCorePkg/tree/master/Docs/AcpiSamples/Source/SSDT-RTC0.dsl)
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By default, this uses `PCI0.LPCB` for the pathing. you'll want to rename accordingly.
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Following the example from above, we'll be renaming it to `PCI0.LPC`:
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**Before**:
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```
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External (_SB_.PCI0.LPCB, DeviceObj) <- Rename this
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Scope (_SB.PCI0.LPCB) <- Rename this
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```
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Following the example pathing we found, the SSDT should look something like this:
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**After**:
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```
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External (_SB_.PCI0.LPC, DeviceObj) <- Renamed
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Scope (_SB.PCI0.LPC) <- Renamed
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```
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### Compiling the SSDT
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With the SSDT done, you're now [ready to compile the SSDT!](/Manual/compile.md)
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## Wrapping up
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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 wrap up:
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* [**Cleanup**](/cleanup.md)
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