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5K HP z27q screen running in 2560x1440 mode only


jya
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Hi

 

My first hackintosh in many years, to replace a Mac Pro 2013.

 

i9-7980xe

Asus x299 Prime

Vega Frontier Edition

Corsair H150i Pro

 

I followed the steps described in 

Almost everything works except sleep (the screen does turn off, but the PC doesn't actually go to sleep), and the fans are running full speed making for a loud unit (much louder than the virtually fully silent Mac Pro 2013)

 

My main issue is with the HP z27q 5K screen connected to the Vega Frontier Edition. It only sees the screen as a 2560x1440 screen (which would happen if it was connected with only a single DP cable).

 

That's with 10.13.3

I tried 10.13.4 beta 2, but it's worse, the screen is no longer working at all (About You Mac now properly lists the Vega Frontier Edition, while before it was just AMD RX XXXXX 16G)

 

Any ideas what I could be missing or try to make it work?

 

I really like that screen :)

 

TIA

JY

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