Apple Pencils can’t draw straight on third-party replacement iPad screens

It's similar to the Face ID failures of the iPhone 13's screen, later fixed.

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[Xenocrates]

Itink you're overestimating the cost of the chip.

But I also think people overestimate how often things happen for a single reason. There are likely several reasons for this setup. Whether this issue is intentional or not is irrelevant IMO. If it's not intentional it's a very happy side effect for them as it'll force more people to go to them for repair.

It may be the chip holds calibration data for the screen, but is encrypted such that an unpaired chip can't be accessed, since that would be a low marginal cost add in as it's pretty much just software, and the manufacturing tolerances are tight enough that the data is almost interchangeable so only fairly demanding users would notice the difference, such as variations in the pressure sensitivity

 

[Xenocrates]

Oh no shitty parts dont work well. Im shocked. Shocked.

Yeah, wait, real Apple parts from an Apple device don't work. Are you calling Apple parts shitty? That's an ironically self aware slip since you failed to read TFA. Although I'd mostly confine that judgement to their peripherals like mice and keyboards.

This is too logical. Needs more knee jerk reactionary anger based on ignorance and stupidity.

His post was logical enough, although yours are knee jerk reactionary.

Each screen has a calibration matrix that corrects for distortion of the digitizer lines.
New screen with blank calibration, will show distortion. Same kind of screen with the calibration data from the other screen will have the calibration matrix, and result is strait lines.

Not quite, since they used a screen from a donor device, that presumably, left the factory in a working condition. It's very possible that the calibration data is keyed to a logic board (which generously, is to prevent stolen devices being broken down for parts, or less so, preventing 3rd party repair)