Proximity sensor problem - hardware or software? - Xiaomi Mi Mix 2 Questions & Answers

Hi.
So I have some problems with the proximity sensor.. Sometimes it works, sometimes it doesn't (about 50%).
I know there are some ROMs with problems regarding this issue, but I'm on MIUI 9 (multirom 7.10.12).
Can this be a hardware problem? Its a new phone of course...

No one?

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[Q] Proximity Sensor Problem

Hello,
i have a problem with my proximity sensor... it simply doesn't work with CM 7 (neither the RCs nor the final 7.0.0), on HTC stock it worked properly (switched display off when i took the phone to my face while calling someone).
When i install Sensor List it shows constantly the Value 9 not regarding if i touch the sensor or hold the phone to my face.
I did a lot of research... but nothing helps.
Many people say that i should change the ro.lge.proximity.delay in build.prop.
But i dont have this value in build.prop. Tried adding it with recommended value 200 but no change.
Also tried the Proximity calibrator from this forum and Sensor Doctor from Marked. Both Apps crash (i think because it doesn't find the ro.lge.proximity.delay value in build.prop).
Also have the always force proximity sensor option in CM setting set.
What can i try? Someone else this issue?
And why isn't there a ro.lge.proximity.delay option in /system/build.prop?
Thanks a lot
to finish this post: i found out that it's a hardware issue, my proximity sensor seems to be defect
and now your warranty is void! xD
time to unroot?
Will unroot if other Hardware defects should appear...
Only this defect is to small to give My Vision away for some weeks
Same her my proximity sensor seems to be defect but i think it's maby dust on it.

[Q]Proximity sensor - software or hardware problem? (video)

Hi guys,
I've got really strange problem with my proximity sensor.
It seems that my proximity sensor has stopped working or to be more specific it does not work in places where is not enough light such as in rooms etc..
Currently using CM7.2 stable but when I unroot my device and flash original ROM the problem is still there.
It causes problems when I make calls, the screen goes black+lock and after I finish my call the screen does not get back so I can not end my phone call.
What do you think? It it software problem which can be fixed somehow or reason for claim warranty?
See please link below
http://www.youtube.com/watch?v=7YP9rNSZ7_w&feature=youtu.be

Sensor problem

I have a huge problem with my note 2,none of my sensors work, i don't know what could be the problem,any kind of help is welcome
Maybe screen protector cause to this problem or you have a hardware issue.
well i don't have a screen protector,and also the gyroscope isn't working,what could be the problem in hardware?and how much would fixing it cost?
http://www.parts4repair.com/gravity-sensor-ic-for-samsung-galaxy-note-ii-n7100-i9300/
yes but that's only for the g-sensor,how about the others can't it be another problem if none of them work?Flexible band maybe?My light sensor,accelerometer,g-sensor none of them work
So i downloaded an app for sensor testing and the readings work on everything accelerometer g-sensor,light sensor,everything,so it isn't a hardware problem.But why won't they work in the menus and apps?Help please.

Realme XT - proximity sensor value not changing. always static

hi guys,
Posting here as real me xt does not have a specific thread and might have same as real me x.
I Just want to know how proximity sensor work on realme xt / x or where it is located.
i found my proximity sensor value is not changing when i am closing camera / top of mobile top.
I'm not sure that is expected or my device (realme xt) has an issue.
Could someone test with sensor tools or any app and confirm please. if that is by design could someone say how that works.
Note : screen off while i place mobile on ear on call.
Thanks in advance.
I believe there is a big bug in reamle XT software related to proximity sensor - many times its happening that I am not able to pick up incoming calls as screen goes off as soon as I bring my finger close to screen to pick the call - this is happening because of proximity sensor issue. This is critical defect that realme need to fix at the earliest! To me this seems like a software bug but not a hardware issue.
Realme xt has a very weird proximity sensor..it just and only works with the ear . This might be make many problems..I don't know exactly how they did it or how it works...may be it is a different technology or may be it is just a bad sensor with a very poor resolution or may be software issue..any ways it works..my be it hangs up sometimes..but it works..
Osamaramzy said:
Realme xt has a very weird proximity sensor..it just and only works with the ear . This might be make many problems..I don't know exactly how they did it or how it works...may be it is a different technology or may be it is just a bad sensor with a very poor resolution or may be software issue..any ways it works..my be it hangs up sometimes..but it works..
Click to expand...
Click to collapse
There is a big bug - I am facing it on a regular basis. If you have realme xt hanged on a mobile holder in a moving car with google maps or some other app running and suddenly a call come in then after answering the call its extremely difficult to turn on the speaker as screen goes off as soon as you bring finger close to screen. This is definitely a software bug that need immediate attention from realme developers!
Realme xt is bull**** mobile. Plz dont buy it
Proximity sensor is not responding properly even though they are not bother to fix this rather saying its working fine..
Its my biggest mistake to believe in realme. I would suggest go blindly for redmi, its really awesome.
I got the problem
Its the exact same issue with OnePlus 6t and 7
It's actually using your hand motion to use the sensor the split second you put it on your ear , I don't know why but I tested it and it only works that way and I tried to move my hand without getting close to my ear (or any surface) it didn't work so there is a sensor but maybe its poor due to the notch so they decided to make it work for only a split second

Question Proximity sensor does not work

The proximity sensor usually does not work.
Any news?
It is harware or software isuue?
Thanks
Check out this thread: https://forum.xda-developers.com/t/screen-turning-on-while-on-a-call.4285411/
all by sudden, my F3 has it proximity sensor working on call today. It's not a joke. Does anybody experience the same? Something change?
My prox.sensor sucks more than anything else that ever sucked before.* Got very angry, and i am skeptic about solving sensor issue in upcoming updates (if there will come some)
* ©Butthead, not Beavis
After I updated to the latest stock rom, it worked and it is working all the time.
foma2805 said:
My prox.sensor sucks more than anything else that ever sucked before.* Got very angry, and i am skeptic about solving sensor issue in upcoming updates (if there will come some)
Click to expand...
Click to collapse
There are NO proximity sensor hardware in the phone, it is only emulating proximity feature using light sensor and etc.
If you test proximity sensor with hardware tester app, it only works when phone is vertical lol and even then it's janky.
The good news is that this can be improved through software.
I guess you are all talking about stock ROM, right?

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