- Apr 5, 2016
- GIGABYTE Z170X-Gaming 7
- GTX TITAN X
- , , , , ,
- Classic Mac
- , ,
- Mobile Phone
You're welcome. It was fun and we learned some things.Hey @joevt
Thanks for your support and your patience, but I have decided to give up.
Like I wrote in my last reply, the Display is way to dark compared to my MacBook Pro.
Maybe the display is damaged or the Driver board. I don't know.
Apart from that I think its to much effort and consumed to much time to deal with the 60Hz. Problem.
Im sending the Display and the iMac case back while I still can.
I hope I can get a partially refund for the driverBoard.
Some other thoughts I had:
- Search Nvidia or AMD kexts for possible boot-args to enable YCbCr422 or whatever.
- Search open source.apple.com for graphics and display drivers for code that can change or query pixel format.
Someone linked a specification sheet for the LM270QQ1 at http://www.go-gddq.com/down/2017-07/17071215336070.pdf
It specifically mentions 8 lane DisplayPort 1.2 support. Nothing about DisplayPort 1.3/1.4.