I have a Z390 Gaming M motherboard and I have used both a flashed Titan Ridge Card and recently just got a Alpine Ridge card. I have an Apple TB Display that I have used with both. The really nice thing about Alpine Ridge is the display turns on at post instead of part way through the boot cycle with Titan Ridge.
I haven't flashed the Alpine ridge card yet. I don't really need the TB bus to work. I really just want it to keep the TB devices in the Apple display active after sleep.
This is what things look like before sleep in my IO reg config. On the left is after sleep and on the right is before sleep.
After sleep the Apple Display speakers, camera, USB hub no longer work. It also will no longer sleep again for more than about a minute once those devices drop as even though they are not there, they seem to keep waking up the computer. I see this in the sleep log file. "DarkWake from Normal Sleep [CDN] due to /: Using AC (Charge:0%) 20 secs".
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I worked with CaseySJ already in the Z390 Designare thread under golden builds. We tried an SSDT to active the TB bus, but this caused an issue where the display would no longer turn on.
I'm curious if anyone has any suggestions? I have tried a few SSDTs, but all have the same behavior where the TB devices in the display stop working after sleep. Would flashing the AR card resolve any of these issues? If so, with what firmware? Would using the 5-3 jumper help instead of using the THB-c cable? I did flash my TR card, so I am familiar with the process.
I'm using Mojave 10.14.6, Open core 0.6.4 and the Alpine Ridge 2.0 card.