How to Fix Big sur flikering with 4K monitor
This mini-guide provides a structural approach to troubleshoot and fix the issue.
Prerequisites
- Confirm your hardware specifications (CPU, GPU, Motherboard).
- Ensure you have a bootable recovery USB and backup your EFI.
Fix Steps
- Check if your GPU requires WhateverGreen or specific boot-args (e.g., agdpmod=pikera).
- Ensure Metal acceleration is fully supported for your macOS version.
- Update Lilu and WhateverGreen to the latest versions.
Verification
- Reboot and verify if the functionality is restored and stable under typical usage.
Original Question:
Hello, I've success installed Big Sur on PC:
+ Motherboard: MSI X370 Gaming Plus
+ Graphic card: Nitro+ Sapphire RX 570 (8G)
+ Storage: Samsung Evo 960 SSD
+ Opencore version: 0.6.6
+ SMBIOS: iMacPro1,1
It's nice working and no problem if using FHD monitor (Dell 24inch FHD)
But with 4K Monitor (Dell 27 inch 4K) it's have an issue: Flickering when open launchpad or move anything window or youtube 4K full screen...
I have changed SMBIOS to iMac19,1/ iMac18,3/ iMacPro1,1/ iMac18,1 but it's still error.
After few time using, I think: The action related to the graphic flickers and then the screen goes black. (sometime auto restart).
How can I fix this problem?
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