How to Fix Wrong default resolution - ultra widescreen (5120x1440)
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
- Review your system logs and verbose boot output for specific error codes.
- Ensure your OpenCore and kexts are up to date.
- Compare your configuration with the official Dortania guidelines.
Verification
- Reboot and verify if the functionality is restored and stable under typical usage.
Original Question:
Hello folks,
I'm currently trying to make my Big Sur Installation to work properly. The installation went till now pretty smoothly (Thanks to Casey's famous guide for the Designare Z390).
Unfortunately I do have a bigger problem with my Samsung C49RG9x monitor. In Mojave everything works as expected (the default resolution is set to 5120x1440), but in Big Sur the default resolution is always set to 2560x720 (all monitor elements are scaled by two, the output resolution seems to be...
Read more
I'm currently trying to make my Big Sur Installation to work properly. The installation went till now pretty smoothly (Thanks to Casey's famous guide for the Designare Z390).
Unfortunately I do have a bigger problem with my Samsung C49RG9x monitor. In Mojave everything works as expected (the default resolution is set to 5120x1440), but in Big Sur the default resolution is always set to 2560x720 (all monitor elements are scaled by two, the output resolution seems to be...
Read more
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