Calibrating touchscreen with `xinput_calibrate` does not work while rotated, only manual calibration works

[blu006]

Hello,

I'm just writing to report on my mis-adventure with calibrating the 2.8" display with xinput_calibrate. I keep calibrating with it and it computes incorrect coefficients. I think either the window it generates is off or it does not recognize rotation... maybe both.

What I ended up doing was tweaking values using xinput set-prop 6 236 until my touchscreen worked properly. 6 is the device-id found from xinput list and 236 is the ID of the Evdev Axis Calibration.

I ended up with this final xinput command which worked well-enough:
xinput set-prop 6 236 3750 180 180 3850

I may have also purchased a slightly different aliexpress clone screen:
https://www.aliexpress.us/item/3256805583718290.html

[katzenjens]

Yeah, there are so many different displays around, it is nearly impossible to include them all. Great that you resolved the issue by tweaking around.