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Dell Precision Tower 3620: unable to get dual screen under High Sierra


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Dell Precision Tower 3620

CPU: QuadCore Intel Xeon E3-1245 v5, 3700 MHz (37 x 100)

Motherboard:  Intel Sunrise Point C236, Intel Skylake-S WS

Video: Intel HD Graphics P530 (two DP port and one HDMI)

Audio: Realtek ALC899 (codec id 10EC0899h / 102806B7h, ver 1000h)

Network: Intel I219-LM 


Today i install HighSierra 10.13.3 , and almost work fine, but some things are not properly work:

1. CPU - can't wake from sleep, do a KP reboot.

2. Can't work with two monitor, work only one - this is important for me. Can i do 2 monitor with enhanced desktop?

3. mic a noice , may be AppleALC will be more good when VooDooHDA?

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you can look here at supported codecs of applealc kext looks like layout id 1,11,12

as for dual monitors what connections are you using maybe try hdmi for second monitor

as for cpu what are you using for power management I think clover has a Eseries cpu patch

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Welcome back, Latitude forum :) Nice to meet you again online!


Jake LO - here iOreg with two monitors connected. 

And added my conf, not sure what i do all right - please, can you check my video and CPU setting?


Added ig-platform-id  0x191B0000 framebuffer (for P530), booting ok, but when i added patch for 4 mon:  


Add the 4th display to your config.plist: Credit - toleda.
Location: config.plist/KernelsAndKextPatches/KextToPatch
Add an item :
Comment : 10.11.4+SKL-1912000-4_displays
Find : <01030303>
Name : AppleIntelSKLGraphicsFramebuffer
Replace : <01030403> 

Got KP on display kexts load.

After booting without 4th display patch - system.log full such events:

Apr 24 16:37:02 COMP com.apple.xpc.launchd[1] (com.apple.displaypolicyd[1061]): Service exited with abnormal code: 1

Apr 24 16:37:02 COMP com.apple.xpc.launchd[1] (com.apple.displaypolicyd): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

But graphics work fine - 3D and 2D without gliches. 




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