I have a driver (for a penmount device) that doesn’t understand the 3 point calibration file, so I need to use the 4 point algorithm.
But there is a problem: the calib tool doesn’t show the bullseyes on the complete screen.
Little sketch to show what I mean:
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As a consequence when I touch the bullseyes as shown above, I can’t use the whole touchschreen after calibration.
When I ignore the bullseyes and touch the 4 corners of the screen, everything is fine.
The problem is: How shall I tell the customer that he mustn’t touch the bullseyes but the corners of his screen?
I have tried several options like offset, manual setting of the screenwidth via -d, but it doesn’t take effect.
Has anyone had this problem too?