Solved Full-Resolution Artifacts!

Posted: February 15, 2019 at 11:19 am

It turns out the problem was that the 1920×1920 signal generated by the Jetson by default was 60hz. While this is a valid resolution according to the specs, I think it requires a dual-link DVI and it’s unclear how HDMI effects this. Anyhow I realized that there is also a 30hz 1920×1920 signal in the EDID and using xrandr to use that resolution resolved the 60hz artifacts. Now that I think about it, my post to the nvidia developer forum does make sense, since I was initially running on DVI and changed to HDMI to rule out the cable. Turns out when I switched from DVI to HDMI, the GeForce card automatically switched from 60hz to 30hz and I did not notice.

I did have some issues making my changes stick on boot, as documented in the post linked above. After installed xubuntu, I can only assume its xrandr-based display settings allowed my preferred 30hz resolution stick on boot.