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<< Solved >> New 4K monitor, now have screen flicker

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I got a new monitor, changed from using DVI to DisplayPort, and from 2K monitor to 4K. Now I have screen flicker.

Anyone know how to fix this?

I changed my model from iMac14,1 to iMac18,1 to no avail.

Installed kexts:

AppleALC.kext
AtherosE2200Ethernet.kext
FakeSMC.kext
IntelMausiEthernet.kext
Lilu.kext
NoVPAJpeg.kext
RealtekRTL8111.kext
USBInjectAll.kext
WhateverGreen.kext
 
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check bios use on board card not auto select. worked for my vizio 4k
 
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use f2 to go to bios. when you select video input? I can select auto or onboard card ! I select on broad card ! auto will give a flickering at screen bottom.
 
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the above solution didn't work for me :(
 
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Tried HDMI and didn't solve either
 
Last edited:

pastrychef

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I don't know. Are you sure the monitor is not defective?

Btw, if you have IGPU enabled and set up correctly, you don't need NoVPAJpeg.kext. That kext disables hardware acceleration.
 
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I don't know. Are you sure the monitor is not defective?

I don't see it happening when booting in windows. I noticed that the system report thinks it's a 5k monitor. Could that be an issue?

Btw, if you have IGPU enabled and set up correctly, you don't need NoVPAJpeg.kext. That kext disables hardware acceleration.

Ooo, thanks for the tip
 

pastrychef

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Asus Z370-G Gaming (Wi-Fi AC)
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i9-9900K OC'd @ 5.0GHz
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RX 6600 XT
Mac
  1. MacBook
  2. Mac Pro
Classic Mac
  1. iBook
  2. Power Mac
  3. PowerBook
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I don't see it happening when booting in windows. I noticed that the system report thinks it's a 5k monitor. Could that be an issue?



Ooo, thanks for the tip

Yes. That can be an issue. I think you may need to inject the correct EDID. I've never had to do this and don't have any experience with it so you'll have to search for instructions.
 
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