iPhone X automatic brightness adjustment failure
IPhone X cannot automatically adjust brightness after changing the screen
发售于2017年11月3日。型号为 A1865, A1901。有 GSM 或者 CDMA 网络制式可选。提供64或者256GB 的存储空间。提供银色和深空灰色。（读音与“iPhone 10”相同）
This is a new issue a few of us have brought up and we are investigating, this also appears to be an issue with the iPhone 8 and 8 Plus.
This is also an issue I have on my personal X.
I replaced my cracked screen with an original screen pulled from another X, and the ALS (Ambient Light Sensor, responsible for auto brightness etc.) no longer works, myself and a few others have also noticed that the brightness also isn’t as bright as it used to be overall.
If you put on your original screen, the ALS works again we have found.
So this is definitely to do with the screen being replaced and not user fault.
When we have an idea how to fix this, we will update accordingly.
Just an FYI for replacing Iphone 8 and X Screens
The short: Apple is automatically disabling the ALS and only Apple or authorized phone repairer's with the Horizon Machine will be able to fix the issue.
If you replace iPhone 8, 8 plus or X screen you need to copy the firmware data of the original screen into the new screen. The needed tool is under development. I saw some working versions, what are tested and working with IOS 11.4 and 12.0 Beta. The screen data can be cloned only to OEM screens for now.
Afte the copy of the data, the light sensor works well again.
If you would like to know more about this problem read this article: http://www.futuresupplier.com/blog/solve...
If you need an ALS box, you can order here: http://www.futuresupplier.com/iphone-8-8...