Title is self explanatory, and the blurriness is actually due to the underscan. I'm just posting this so I can answer it myself, since I struggled with this for ages.
1 Answer
Despite having set xrandr --output <display_name> underscan off (and every other setting under the sun), when I did the following that was when my issue was fixed:
xrandr --output HDMI-A-0 --set "underscan vborder" 0 xrandr --output HDMI-A-0 --set "underscan hborder" 0 I hope this is permanent, but I don't think so. That's the next step, but at least it's working for now!