I have a 49" ultrawide. I downloaded DisplayFusion to use the monitor split feature.

The monitor has a resolution of 5120x1440, but DisplayFusion is detecting it as 3840x1080. When I go to the Split configuration, it won't let me specify the height and width with numbers greater than what it's detecting.

This might be relevant, but I wasn't able to set the resolution with native Windows. I have to use the Intel Graphics Command Center. But once I do that, Windows detects it properly.

See attachment

Hi, see my follow-ups. It is now correctly detecting the resolution since I changed cables. My problem now is that it won't let me save the split configuration.

Yes, I get the error when I hit Save. I cannot get it to split. It did an auto-split so currently, it's split in 2, but I can't make any custom changes.