As y’all are aware, we can use xinput_calibrator or similar tools to calibrate a touchscreen. This requires that we tap on the top-left, top-right, bottom-left, and bottom-right, etc. Unfortunately, as y’all are also aware, circles do not have corners.
What’s the best way to calibrate the HyperPixel2.1 circular touchscreen? I ask because it’s a little off when I tap it: I’d like to tweak it by hand (a few pixels up, a few pixels to the left, etc.) but I’ll need a default MinX, MinY, MaxX, MaxY set of values for the device entry in /usr/share/X11/xorg.conf.d/99-whatever.conf :)
Thoughts?
Thank you.