Joshua Ellinger

It seems that numbers in hdmi driver are wrong for this mode. Here is a patch which might solve the issue, although not tested for obvious reasons:
https://transfer.sh/UCKIH/zzz-fix-video-modes.patch
Note that link is valid only for 14 days.
 
You can add this patch to build system and build your own image. If it works, we can include it in upstream repo. Although if you are not familiar with linux, this might be a nice challenge, but you will learn a few things along.

And what is native resolution of this screen? If it is some weirdo, kernel hacking and some math is required. That is hard even for experienced Linux users.
 
If you don't want to have painful early Linux experiences, use standard hardware. 1080p / full HD monitor in this case.

It looks like portrait orientation instead of landscape ...