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kreizlie / HP-EliteBook-840-G4-Hackintosh

OpenCore setup for HP EliteBook 840 G4 Hackintosh running macOS Catalina 10.15
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newer BIOS versions - what causes it to break OpenCore? #3

Closed certuna closed 4 years ago

certuna commented 4 years ago

As more HP users have found out the recent HP BIOS versions break booting OpenCore (and Clover too btw). Is there any progress anywhere in finding out what exactly causes this?

kreizlie commented 4 years ago

Hi friend, do not use HP BIOS 2020 or later, I did some experiments on it, the latest BIOS that works for me is BIOS 2019, in my opinion that BIOS versions are buggy or HP has implement feature that is not supported by OC. Just downgrade your BIOS version.

ghost commented 4 years ago

New BIOS causes this in DSDT RTC device:

Device (RTC) { Name (_HID, EisaId ("PNP0B00") / AT Real-Time Clock /) // _HID: Hardware ID Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings { IO (Decode16, 0x0070, // Range Minimum 0x0070, // Range Maximum 0x01, // Alignment 0x02, // Length ) IRQNoFlags () {8} }) Method (_STA, 0, NotSerialized) // _STA: Status { If ((STAS == One)) { Return (0x0F) } Else { Return (Zero) } } }

We need to return 0x0F. This can be fixed by ACPI rename or better way - by SSDT file. You can look at this repository. kecinzer/hpelitebook850g5-opencore@65338fe

kreizlie commented 4 years ago

Great work, thank you @DominikHackintosh