My suspicion is that there’s some kind of extra data being pushed over the HDMI, since the Smart Board is more than just a monitor
Yeah I have similar suspicions. Maybe some non standard HDMI protocols or extensions are at play. After all it is a patented, closed source protocol. Standard monitors and TVs (smart or otherwise) connect without any issue.
I would start by asking in the ublue Discord. There may be an easy fix, or they may direct you to the project where you should file a bug report.
Thanks for the advice. I will start with this.
This was common in budget laptops 10 years ago. I had a Asus laptop with the same resolution and I have seen others with this resolution as well