Leaderboard

@Baio77 It turned out to be a simple fix. The culpit was that GPIO device in the unit #2 was not enabled by the generic "SSDT-GPI0.aml" patch used in my EFI. I had to use a different method, by setting GPEN =1, to enable it (as explained in the OpenCore guide, for my particular case). Also, I updated to the latest woodooI2C.kext. Now the touchpad worked! Here is the updated SSDT-GPIO.aml, only works on unit #2 (it's BIOS ACPI code will enable GPIO if GPEN =1): /* SSDT-GPIO.aml */ DefinitionBlock ("", "SSDT", 2, "DRTNIA", "GPI0", 0x00000000) { External (GPEN, FieldUnitObj) If (_OSI ("Darwin")) { \GPEN = One } } For comparison, here is the generic patch, which works on unit #1, not unit #2 (#1's BIOS is different. Not 100% sure caused by the version difference, or hardware difference): DefinitionBlock ("", "SSDT", 2, "hack", "GPI0", 0x00000000) { External (_SB_.PCI0.GPI0, DeviceObj) Scope (_SB.PCI0.GPI0) { Method (_STA, 0, NotSerialized) // _STA: Status { Return (0x0F) } } } @Baio77: The AlpsHID kext also worked, but GPIO must be enabled first.