How to Fix GA H170N-WIFI dual HDMI display Big Sur
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
- Verify your network controller model (Intel, Broadcom, Realtek).
- Ensure the correct kext (e.g., AirportItlwm or BrcmPatchRAM) is loaded in your config.
- Clear network interfaces and reset NVRAM if changes don't apply.
Verification
- Reboot and verify if the functionality is restored and stable under typical usage.
Original Question:
I had my dual displays working then tried an upgrade to Ventura not knowing that the dual monitors was not supported with this motherboard. At least all I got was mirror versions.
I had to reinstall Big Sur from scratch because I could not downgrade. Now I have Big SUr installed with opencore 8.7.
I have a GA-H170N-WIFI with Intel 6700k chip and 32GB of RAM.
Strange thing when I go to the About this Mac then choose Displays they both show up. I cannot mirror or Arrange them but they both...
Read more
I had to reinstall Big Sur from scratch because I could not downgrade. Now I have Big SUr installed with opencore 8.7.
I have a GA-H170N-WIFI with Intel 6700k chip and 32GB of RAM.
Strange thing when I go to the About this Mac then choose Displays they both show up. I cannot mirror or Arrange them but they both...
Read more
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