extreme lag / fingerprint not working - Xiaomi Mi A1 Questions & Answers

hey guys i have the phone for almost a year now, without problems but suddenly the fingerprint sensor stopped working and the phone was lagging extremely hard, the sensor works partially but not with a recognizable pattern, sometimes it may work (if im lucky to enroll a FP)
ive tried everything, re-partitioned back to stock, flashed stock, changed kernels, flash non treble, every rom has the same problem
does anyone else faced any similar issues?

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Ghost issues and soft keys .

I have my nexus 4 for a year now, it's a pretty good device but recently I'm experiencing strange issues, It first started with the soft keys suddenly not working so even after rebooting they would only go away after some time then I tried switching to a custom ROM it worked fine until the problem happened so I flashed the stock android 4.4.2 and same thing but actually now I see ghost touches and the softkeys not working !!! I read that replacing the battery might fix it is it true ? If it is then why? Any way to solve this ?

Homebutton is only working on second touch after unlocking

Hi,
I have my OP2 for some weeks now and I am very pleased with it.
But since the beginning I have a problem: My homebutton is only working on the second touch after I unlock my phone every time. It seems I have to "activate" it before it responds. After that it's working perfectly.
Currently I am running Exodus and AK kernel, but I also experienced this while on CM, Slim and Oxygen. (On OxygenOS I am not very sure because it could possibly be because of fingerprint stuff...)
Is anyone else experiencing this behaviour?
I am not sure if I should return the device.

Proximity and ambient light sensor stopped working!!!

I don´t know if it´s a coincidence or not, but I a few days after the update to Oxigen OS 3.6.1 I noticed that the proximity sensor and light sensor of my ONEPLUS 2 stopped working.
I used AndroSenor and Sensor box from the PlayStore, and both os them say thar the proximity and light sensors are missing.
I had a remote session with a ONEPLUS L2 specialist and they wiped my phone and reflashed the latest ROM (ver. 3.6.1), but the problem wasn´t solved..
I guess that, if the sensors don´t appear in the apps I mentioned maybe it´a a hardware problem, but I would like to hear more opinions.
If anyone has any suggestion to try to solve this problem before sending it to repair (out of warranty)??
flash persist.img from fastboot
backup all your info
in some cases it will help
hi there!
I seem to be having quite a similar problem, though, my sensors work, but stop responding after an unspecified period of time (can be anywhere between minutes and hours).
I tried flashing several roms (oreo, nougat) and yesterday i flashed Oreo Pixel Experience (just pure ROM+OP5 camera, no root no custom kernel just to rule out a few things) but the issue remains. Important to mention, i always clean flash.
The best way to describe the issue is: "sometimes the proximity and light sensor just stop working and i dont really know why" which is obviously causing a whole bunch of issues with auto brightness, making calls, picking up when someone calls etc.
The thing is, everything works after a reboot...but only for some time...then the sensors go "offline".
sometimes they work for a couple of hours, even a day...sometimes they die after half an hour or something. I have a feeling that i see them die faster when i have my phone in the pocket and leave it idle for a while, and when i use my phone often and dont really give the phone time to rest they live longer. It almost feels as if the phone goes to some deep sleep when idle for some time, disconnects the sensors, but doesnt turn them on again when woken up.
tried flashing the persist.img as advised just above, but it doesnt seem to have an effect.
anyone has any good idea?
thanks!
allright, being desperate from not being able to use my phone in a normal way i flashed OOS 3.6.1 from official zip files that can be downloaded from oneplus.net support section, using OP recovery and surprise surprise - sensors are working flawlessly! so im ruling out the HW problem. I think im going to stick to OOS for a while to monitor the sensors and eventually im going to try flashing oreo again.
ok, last update from my side: after two days on OOS where everything worked fine i flashed Pixel Oreo build and sensors continue working just fine! so, whoever is experiencing strange behavior of his sensors, i recommend the same approach.
Jackill said:
ok, last update from my side: after two days on OOS where everything worked fine i flashed Pixel Oreo build and sensors continue working just fine! so, whoever is experiencing strange behavior of his sensors, i recommend the same approach.
Click to expand...
Click to collapse
You still have working sensors?
I have exactly the same behavior as you mentioned in your first post. FRUSTRATING!
I've tried flash lineageos 15.1 ROM, no luck. New persist.img from official fastboot oos ROM but no luck either.
flaektrem said:
You still have working sensors?
I have exactly the same behavior as you mentioned in your first post. FRUSTRATING!
I've tried flash lineageos 15.1 ROM, no luck. New persist.img from official fastboot oos ROM but no luck either.
Click to expand...
Click to collapse
Hi! Yes, my sensors are still working just nicely.
Jackill said:
Hi! Yes, my sensors are still working just nicely.
Click to expand...
Click to collapse
So good for you ?
Before when your sensors struggled, did they also disappear from any sensor test app. Or did they just not work?
My prox sensor did not disappear but just hangs at 0 or 5cm if I check the value in any sensor app. And light turns 0 Lux also.
I've similar problem. Went completely stock as suggested but the problem persisted.
flaektrem said:
So good for you
Before when your sensors struggled, did they also disappear from any sensor test app. Or did they just not work?
My prox sensor did not disappear but just hangs at 0 or 5cm if I check the value in any sensor app. And light turns 0 Lux also.
Click to expand...
Click to collapse
Well mine didnt really "dissappear" either. They "froze" too. Lux froze at whatever value it measured the last however i am almost certain it was never exactly 0. Prox behaved the same as you describe: 0 or 5.
lazyfarmer said:
I've similar problem. Went completely stock as suggested but the problem persisted.
Click to expand...
Click to collapse
Interesting. I'm going to flash OOS recovery and latest OOS ROM later today and give it a try.
Jackill said:
Well mine didnt really "dissappear" either. They "froze" too. Lux froze at whatever value it measured the last however i am almost certain it was never exactly 0. Prox behaved the same as you describe: 0 or 5.
Click to expand...
Click to collapse
My lightsensor always freezes at 0 Lux. And when the prox freeze at 0 its impossible to quit a call. So f*cking frustrating so I have to fix this problem ASAP
I have the same problem with my LUX device, sometimes the sensors work randomly. When I reboot my phone the sensors stop working. The screen does not rotate, the most interesting thing is that it did flash the Moto camera mod and the rotation works perfectly with the camera, with the stock camera there is no rotation.
UPDATE:
I scheduled a remote session with Oneplus L2 Team and they performed a full factory reset of all partitions. No luck, problems still persist.
It must be a hardware problem.
In my case I sent the smartphone to them and they said it was a problem with the motherboard.

Problem with the fingerprint recognition

Hello all.
I have a problem with the fingerprint recognition.
I have an s7 edge with the exynos cpu and with the latest official rom.
When I first set the fingerprints up, they work flawlessly for about a month. After the first month, the recognition of my fingerprints starts getting worse and worse and it ends up all most not recognizing them at all. (Success rate of 1/20 or worse).
I delete all of the fingerprints and set them up again from scratch. I even try to put my finger in different ways and positions on the sensor but the problem persists. The first month everything works great and then chaos.
The only thing I haven't tried yet is factory defaults because setting everything up on the phone again is a pita.
Any suggestions?
If setting fingerprints from scratch helps and they are recognised at first, think about your fingers. Maybe due to the nature of your daily job, your finger skin changes, making it difficult to recognised after so long.
i've had the same issue on stock rom, so maybe try custom? for me stock wasnt unblocking too often with finger, so after going to custom I was surprised by how well it works

Touch not working in games - Custom Rom

I've been looking around to solve this issue, but haven't have much luck. It looks like it's an issue with a good number of ROMs on this phone, but my issue is that after some time, the touchscreen in some games and apps stops working normally.
Phone is running Lineage 16, rooted w/ magisk
To have it work, I need to hold one finger on the screen and the other finger will register properly.
The issue can temporarily be fixed by rebooting the phone.
I notice the issue occurring when an app/game accesses the camera. At that moment, issue occurs.
I came across this in my searches: https://review.lineageos.org/c/Linea...ative/+/198809
Not sure exactly how to work with that, but I figured I would provide as much info as I can before asking for help. Thanks ahead for the help

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