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39 lines
1.3 KiB
Plaintext
39 lines
1.3 KiB
Plaintext
/*
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* USB compatibility table for disable phantoms EHC1, EHC2.
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*
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* Attention!
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* Only for 7,8,9-series chipsets and 10.11 and newer!
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*
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* To disable EHC1 and EHC2 - set an option "XHCI Mode" to "Enabled" in yours BIOS.
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* If the "XHCI Mode" option is not available in yours BIOS or works incorrectly, then use this ACPI table.
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* Disabling through BIOS is preferable whenever possible.
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*
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* WARN: for some motherboards you need to use either "EH1D = One" or "EH2D = One" but not both!
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* This is because for some motherboards, device (EHC1 or EHC2) is used by macOS. Check the IOReg.
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*/
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DefinitionBlock ("", "SSDT", 2, "ACDT", "NOEHCx", 0x00001000)
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{
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Scope (\)
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{
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OperationRegion (RCRG, SystemMemory, 0xFED1F418, One)
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Field (RCRG, DWordAcc, Lock, Preserve)
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{
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, 13,
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EH2D, 1,
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, 1,
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EH1D, 1
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}
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Method (_INI, 0, NotSerialized) // _INI: Initialize
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{
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// In most cases this patch does benefit all operating systems,
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// yet on select pre-Windows 10 it may cause issues.
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// Remove If (_OSI ("Darwin")) in case you have none.
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If (_OSI ("Darwin")) {
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EH1D = One // Disable EHC1
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EH2D = One // Disable EHC2
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}
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}
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}
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}
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