I have a Raspberry Pi 3 with a Kuman TFT touchscreen. AstroPrint is flipped on a diagonal axis. The upper right and the lower left are correct but the upper left and the lower right are swapped. I assume that I need to modify the 99-calibration.conf file, but I’m not sure what to put in.
This screen is not supported. Not only the axis is flipped but your color are likely inverted. Please take a look at this to see which screen our AstroBox Touch supports: https://astroprint.zendesk.com/hc/en-us/articles/360000761606-What-hardware-do-I-need-to-build-my-own-AstroBox-Touch-
I think that one person here: Rotate Astrobox Touch display
Had also the same screen and in the end he was able to rotate it correctly.
present, I actually succeeded