Apple Pencils don’t draw straight on replaced iPad screens
arstechnica.com
Apple Pencils don’t draw straight on replaced iPad screens
1–10 of 164 posts
Re: Apple Pencils don’t draw straight on replaced iPad screens
#2Note: I slightly edited the title for accuracy. In particular, it appears "third-party replacement screens" doesn't refer to third-party-manufactured screens, but merely replacements performed by third parties using genuine Apple screens. And we simply know that they don't draw straight lines, not that they "can't".
More reading: https://www.reddit.com/r/gadgets/comments/15cxwaa/apple_penc...
Re: Apple Pencils don’t draw straight on replaced iPad screens
#3Avoidant as I am of Apple's ecosystem, I can only imagine the "security" justification for serializing a display panel. Covert exfiltration of sensitive information from password managers and such?
At any rate, I continue to be unamused by how difficult it is for normal people to service their own Apple devices.
Re: Apple Pencils don’t draw straight on replaced iPad screens
#4Seems to me like it might be a calibration issue, and third parties aren’t able to perform the calibration.
Re: Apple Pencils don’t draw straight on replaced iPad screens
#5[flagged]
Re: Apple Pencils don’t draw straight on replaced iPad screens
#6Seems to me like it might be a calibration issue, and third parties aren’t able to perform the calibration.
I have no way to verify this, but this Redditor claims it's due to the serial number being different, not calibration (also see the grandparent comment that they posted): https://www.reddit.com/r/gadgets/comments/15cxwaa/apple_penc...
That said, I see a generous explanation that I can't rule out based on what they're describing. It seems like the only test this Redditor mentioned was that you can modify the serial number and cause it to go from correct behavior to misbehavior. But I would think the reverse direction is the real test, since otherwise this could just imply that the device is looking up some embedded calibration information for that serial number and not finding it, and therefore falling back to some default behavior?
Re: Apple Pencils don’t draw straight on replaced iPad screens
#7Avoidant as I am of Apple's ecosystem, I can only imagine the "security" justification for serializing a display panel. Covert exfiltration of sensitive information from password managers and such? At any rate, I continue to be unamused by how difficult it is for normal people to service their own Apple devices.
> their own Apple devices.
thats a slightly different interpretation of the situation than what the mighty apple has :) and I suspect thats where most of the "confusion" is :)
Re: Apple Pencils don’t draw straight on replaced iPad screens
#8Seems to me like it might be a calibration issue, and third parties aren’t able to perform the calibration.
Apparently it is not. The reddit thread has an ex Apple employee who runs repair shops in Germany. He says if you just change the serial number of a iPad screen(using specialised hardware) in existing iPad this issue will appear. This seems to indicate that it’s intentionally done by Apple.
Other option is that Apple bakes in calibration details of all possible serial numbers in every iPad sold which doesn’t sound like a plausible scenario.
Re: Apple Pencils don’t draw straight on replaced iPad screens
#9Avoidant as I am of Apple's ecosystem, I can only imagine the "security" justification for serializing a display panel. Covert exfiltration of sensitive information from password managers and such? At any rate, I continue to be unamused by how difficult it is for normal people to service their own Apple devices.
> Avoidant as I am of Apple's ecosystem, I can only imagine the "security" justification for serializing a display panel. Covert exfiltration of sensitive information from password managers and such?
They're a more valuable target for theft the more parts that can be "cleanly" sold.
Re: Apple Pencils don’t draw straight on replaced iPad screens
#10Seems to me like it might be a calibration issue, and third parties aren’t able to perform the calibration.
Apparently it is not. The reddit thread has an ex Apple employee who runs repair shops in Germany. He says if you just change the serial number of a iPad screen(using specialised hardware) in existing iPad this issue will appear. This seems to indicate that it’s intentionally done by Apple. Other option is that Apple bakes in calibration details of all possible serial numbers in every iPad sold which doesn’t sound li…
Why would the calibration details need to account for all iPads sold?
Just bake the one that the device is bonded with, using the display serial number as a lookup key.
Then, if you change the serial number of the display, the lookup would fail, and fall back to whatever "default" values are.