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https://www.tonymacx86.com/threads/success-gigabyte-designare-z390-thunderbolt-3-i7-9700k-amd-rx-580.267551/post-2049168 @CaseySJ Managed to do a clean OpenCore Catalina build from scratch. I used the Vanilla OpenCore guide (used propertree as the plist editor) and with some minor issues...

So glad to see someone else fixing the same problem. I bet there were more people that had the same issue. Congratulations!

Thanks, Casey! The make/model of the HDD is Pegasus R4. This is their first version on TB1. This wasn't working before at all, neither in OSX or on Windows.

Well I have the low cost clip and I couldn't fit it once. Must be a different one maybe. We have not used a magnifying glass but I believe my friend did a pretty good job and was clean about it. Yes, he used IPA to clean the motherboard after each solder. I'm actually going to get a...

Yes, flashrom never reported that the chip was in an unknown state, all readings and writes went fine. I had lots of difficulties keeping the clip on the chip, so we ended up soldering little wires to all of the pins of the chip, which then were connected to the Pi. First time it happened...

Yes, Thunderbolt tree is still truncated. Trying a cold boot now. EDIT: Tried a cold boot, results are the same. I wonder if something might have happened to the chip. It's weird enough that after reflashing back to the original firmware, it still wasn't working. Is there a way to check if...

Sure, tis done.

Here you go, Casey! Thanks!

Hi Casey, I've managed to reflash the chip after a bunch of tries. Initially reflashed it back to the backed up original firmware. Then went ahead to check functionality in Windows and it won't see the ports at all. Curiously enough, USB-C devices worked while with Elias's firmware, USB-C...

Actually after reactivating it in BIOS, it ended up booting. TB Bus shows the same. Will re-read the chip and do the checksum.

Yes, MSR 0xE2 was re-locked indeed. Fixed that and it's still not booting. Disabled Thunderbolt from BIOS, system boots. Thunderbolt Bus in system information shows the same thing, even with discrete Thunderbolt disabled in BIOS.

There was an issue with the GND pin that wasn't connected. Now I soldered it back and it should be working. Only problem is - I can't start OSX anymore after the BIOS reset happened. Gets stuck here "End RandomSeed ++++++++++++++++" Any ideas?

I've been troubleshooting this problem, and I've been checking the GND pin on the chip, maybe there was a soldering issue there. Tested the ground loop with another GND on the case, looks like there's an interruption there. Checked the GND pin of the BIOS chip after that, ground loop works...

@CaseySJ Did you manage to take a look at this? I hope the firmware installed properly. It did say VERIFIED at the end.

Updating what you asked before about warm booting to Windows and check thunderbolt. I've managed to make it boot to Windows from Clover now. For some reason my Windows was installed in legacy mode, on a MBR partition. Converted it to GPT. Thunderbolt in Windows is not working either after a...

Here you go.

Awesome, thanks so much! I did exactly this, saved, rebooted and system information shows me the same thing with a different Domain UUID. Is it supposed to behave differently? I'm using a Startech TB3 to TB adapter. Here's my ACPI folder:

Thanks, Casey! At the moment I'm having issues with booting Windows through Clover, I'm not sure why. I have to boot from BIOS. You were saying somewhere that the chip should be partially readable with the VCC pin disconnected, then connecting the PSU would make it fully readable. Regarding...

What do you mean by warm boot to windows? The chip was unreadable with the VCC pin disconnected, I haven't tried to connect the PSU with the VCC disconnected. I've connected the VCC after that and it worked. Proceeded to do three firmware dumps, checking then writing the modified one. System...

Yes, I've tried that and didn't work. I think the clip was the problem. Later on, I had a friend come over and help, he ended up soldering all the pins to the chip, managed to flash it successfully. Now, is thunderbolt supposed to work properly on windows after flashing?