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Intel HD4000. External monitor. Banding gradients

Joined
Mar 20, 2020
Messages
8
Motherboard
ASUSTeK COMPUTER INC. N56VB BSN12345678901234567 1.0
CPU
Intel® Core™ i7-3630QM
Graphics
Intel Graphics HD4000
Hello.
Problem: on internal monitor all colors are perfect. on External - I have banding gradients and colors.
1588876579357.png


My system: Catalina 10.15.3
Intel HD4000
Intel® HM76 Chipset
External monitor 21:9 2560x1080 via HDMI.
Clover 5115

In mac Graphics/Displays I see only 24bit of color depth. Is it OK?
1588876756503.png


Installed kexts:
1588876348447.png


I don't update WhateverGreen, because then my external monitor stops working.

My config.plist:
1588876430572.png


How to fix it? Thank you in advance
 

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