[Q] Fingerprint sensor pressed without touching?! - Xiaomi Mi 5s Questions & Answers

Hi Guys,
I got a really strange and annoying issue. Since a while my it seems like the homebutton is pressed by itself. With the fingerprint recognized turned on this results in a wake up of the phone! Strangely my (correct) fingerprint is not necessary and the phone is unlocked.
I already cleaned the sensor with (medical) alcohol and restored default setting. I'm of course worried about the hardware/sensor that is broken but of course hope that you guys recognize this problem and maybe have an solution
Thanks by advanced

Related

[Q] Proper proximity sensor values

So here is my problem: Some time ago i was using the "in pocket detection" and it was working perfectly fine, then i disabled it, then yesterday i enabled it and it wouldn't work :/
Since i thought it has something to do with the proximity sensor i downloaded some app that checks sensor output data and it reports value either 3.0 when i move something towards the sensor or 100.0 when i move away. I was wondering if that's the normal behavior. (not increasing linearly but rather acting more like a switch 1-0 behavior)
Also, i have no problems with screen blacking out during calls (it turns off and back on as expected), proximity lock works fine with an external app, but not with the "In Pocket Detection" in settings/display.
Any clues on what could be causing the problem and any suggestions how to fix it?
It is by no means critical but I just want to figure out what's wrong.
I think it's the correct behavior. The proximity sensor works more like a switch. I belive the In Pocket Detection also uses the camera and/or the accelerometer for the "detection" ...
Thanks for your reply.
Well, in the end i just flashed CM7 on it so i don't have the in pocket detection anymore

Front sensors waking phone?

So i use the fingerprint unlock and recently ive noticed my phone has been getting hot and dying quickly. I think i found the issue and i dont know if this is a settings issue or it supposed to be like this. After i lock my phone if anything comes close to the sensors to the left of the front facing camera it wakes my phone. So even in my pocket i will pull it out and the screen is on already. Is there a way to stop this? Is it a defect?
jbarresi19 said:
So i use the fingerprint unlock and recently ive noticed my phone has been getting hot and dying quickly. I think i found the issue and i dont know if this is a settings issue or it supposed to be like this. After i lock my phone if anything comes close to the sensors to the left of the front facing camera it wakes my phone. So even in my pocket i will pull it out and the screen is on already. Is there a way to stop this? Is it a defect?
Click to expand...
Click to collapse
Do you have Air Wakeup turned on?

Light sensor and proximity sensor issues

Hello guys,
Reading around this seems to be a rather common issue among lg g2, lg g3 and lg g4 users.
the first one regards the light sensor. In relatively light environments, the light sensor value is too low, leading to the screen turning off soon after hitting the power botton and disabling the double tap. The same thing happens when you cover the sensor with the finger and is meant to be active while in our pockets, which is great, but the problem itself is very annyoing.
Initially I thought this was due to a software problem, but after performing a kdz reset on KK (from lollipop) I can assume that it has nothing to do with the OS.
The problem seems to diseappear soon after the reboot, but reappearing shortly after and it appeared later in the life of the phone, it worked fine for a long time.
But the first issue to appear to is the proximity sensor issue. Most of the time it is set to "near" even though there is nothing covering it. I opened the phone, cleaned it, hard resetted but still nothing. no solution seems to be effective. Of course this is very annoying during phonecalls and this is also disabling the double tap feature.
In a normal room situation during the evening with the light turned on and my body projecting a shadow over the phone, proximity: "near" and lightsensor: "2"
The combination of these 2 problems is making my experience with the G3 very unpleasant.
I don't who builds sensors for LG but they are not doing a great job!
So if you have the same problem you are not alone!
some tricks that I "learned" in order to overcome these problems are.
1) Light sensor:
- point the device towards a light source to unlock the device
- repeatedly press volume up after pressing power button to prevent screen turning off
2) proximity sensor
- reboot the phone before a phonecall
- running a device test through 3845#*855# (international version of the phone)
- using bluetooth systems during calls
- using headphones
If somebody has additional suggestions to provide me and the others please share.
Thanks!

Fingerprint problems, but only on MIUI roms?

Hi,
As the title says, I'm experiencing some problems related to the fingerprint sensor, specially when I try to wake the device as I have to put my finger in the sensor twice because the phone doesn't recognize my fingerprint at the first try, it just vibrates, but the second time I put my finger it wakes up the phone with no problem. It feels like the sensor puts itself in deep sleep mode as it happens like 15 seconds after I turn off the screen.
The fingerprint sensor works fine when the screen is on, as I can unlock protected apps at the first try. But some apps that include their own fingerprint authorization like Paypal or my bank account app shows me an "error" as soon as they ask me for the fingerprint, like the fingerprint sensor is already in use (not sure how to explain it), but they work as soon as I put my finger on it.
Pressing the sensor for a little longer wakes the device at the first try, but I'm pretty sure that's not the normal behaviour.
Disabling the pocket mode doesn't help either.
As the title says, this only happens on every MIUI rom Iv'e tried, like Xiaomi.eu, Mi-global or Revolution OS, always made a clean flash. I've tried Havoc-OS and Pixelexperience and the fingerprint worked flawlessly, not a single problem with those roms and that's what makes me think that it's a software related problem. In fact, I'm currently using Havoc 3.0 and the fingerprint sensor is working great.
I've also tried to flash persist.img from the chinese official rom without success. And needless to say that I've cleaned the fingerprint sensor several times.
I know it's not a big deal of a problem, but it's driving me crazy. So any help would be appreciated as I really want to use MIUI instead of any other custom rom.
TL;DR: I have to use the fingerprint sensor twice to wake my device and feels like the fingerprint sensor puts itself on deep sleep mode or that it's already in use somehow. But it only happens on MIUI roms.

Question Issues with fingerprint sensor

I've had my phone for over a year now. Never had issues with anything.
Recently when I tried to unlock the screen with my finger it didn't recognise it. It was vibrating but saying that fingerprint is not recognised. I thought the screen is dirty so I wiped it - didn't work. Then I thought I have cuts on my finger so I tried to add new fingers but it doesn't work... Fingerprint sensor lights up but it's not vibrating and not scanning my finger.
I've tried resetting my phone and still couldn't register fingerprint. I've reset it again and it worked! But only for 2 days... Now again the fingerprint sensor doesn't work.
I'm on LE2123_11_F.75
Has anyone experienced something similar? Just wondering whether it is software or hardware issue?
Depending on where you bought your phone, it usually comes with a warranty 2 or 3 years.
Try log a case with OnePlus directly.

Categories

Resources