Touching the fingerprint sensor... - Xiaomi Redmi 4X Questions & Answers

Hi all! I tried a few oreo roms and only aicp_santoni_o-13.1-WEEKLY-20180318 (maybe there are more) has this option: waking the device with a simple touch of the fingerprint sensor (without setting your fingerprint)! I hate to use the power button.
When I bought the phone it had MIUI8 and that option but i really don't like miui and i tried oreo !
My question is if I can activate/find this option in the rom settings? It's something related to the kernel/firmware?
Have a nice day!

Related

How to Disable proximity sensor.?

Hi Guyz,
My friend dropped his nexus one on the floor and from then on he is facing a weird problem. When he receives a call, when the sensor is turned on, the screen never comes back and it remains black. The only option is to pull out the battery and i suppose the drop has made proximity sensor faulty. He is not a rooted user. Is there any menthod to disable proximity sensor without rooting ? If not how can i fix it after rooting ? Any build.prop changes ?
Thanks,
karthik
RE: how to disable proximity sensor
karthikus said:
Hi Guyz,
My friend dropped his nexus one on the floor and from then on he is facing a weird problem. When he receives a call, when the sensor is turned on, the screen never comes back and it remains black. The only option is to pull out the battery and i suppose the drop has made proximity sensor faulty. He is not a rooted user. Is there any menthod to disable proximity sensor without rooting ? If not how can i fix it after rooting ? Any build.prop changes ?
Thanks,
karthik
Click to expand...
Click to collapse
hey Karthikus , I know this is not a new post, I would like to know if you solved your friends's problem, I have exactly the same, I used a couple of apps to disable the proximity sensor but still no luck, by the way I have the cyanogen mod 7 in my nexus now. the phone is a beauty, but its kinda annoying to have to remove the battery after a few calls, also I'm using a bluetooth headset, wich kinda minimizes the problem, but still not happy. please let me know , or not, I'm planning to build a disable sensors app myself in case I can't fixit. oh, and I tried all the other solutions I could find in google, like cleaning the sensors, (I dismantled the phone already) and enabling other ways to bring the screen up using other methods like trackball press or menu press. no way, still there. so please let me know. if still relevant.
thank you.

Display issue

Hey guys,
My phone barely turned one year a week ago and now I'm having some issues!
The display seems to lose it's sensivity after a 5-30minutes use. Completely random. I can turn on/off the screen, I can use the fingerprint sensor (and it works) but it "feel my touches". It just doesnt respond to my touches.
The only thing I can do is to force reboot, pressing the on/off button for 5-10seconds.
I switched from xiaomi.eu to global stable and it does the same thing. Now I'm going to switch to the latest LineageOS maybe it works.
I couldn't find my problem on Google, all other display issues seems to be different from mine.
Thanks guys! Awaiting tips!

Questions: fingeprint scanner and firmware version

I'm happy user of 4x for a few days. Currently I am on LineageOS 15.1, treble version. I have some noob questions - I tried searching for answers but couldn't find ones that satisfied me.
1. Can I disable fingerprint scanner or prevent touching it from waking phone? (except putting tape on it)
2. How to check firmware version? Which version is the best?
3. On the box of my 4x there is a date 2017.10 - does my phone have rgb LED or white one?
4. Do you guys also have some strange touchscreen issues, like when scrolling trough a page, phone reads swiping as tap+swiping or hold+swiping? Sometimes it just marks some text or redirects me to another page in chrome (If I swipe by putting my finger on text or link). Also, what's stranger - when I put my phone on desk or another flat surface - I can't pull down notification bar. When I take phone in my hand - it works fine...
5. Is there a way to increase vibration strenght? I already made it 100% via Kernel Adiutor, but can it get even stronger? Sometimes I just do not even feel it in my pocket. Or maybe there is a ROM with option to make custom vibration pattern for every app?
I hope you guys can help me.
1. Turn of lock screen, your device will not wake by fingerprint scanner touch unless you click power button or volume rocker buttons (if it's has been set to wake device) i am using DOT OS 2.4 and it's working fine.
Don't put tape??
2. Don't about firmware.
3.try using apps like light manager or some other apps to check RGB lights but it must needs to be enabled in ROM if it isnt then it wont will work.
You'll also see different colors depending upon battery percentage while when charging your device.
like I have said to you in your another thread early production redmi 4x has RGB LED notification lights and later after they started giving only white light (as per I saw many users reporting that they are getting only white LED)
RGB lights are turned on by default in RR,DOT OS,MIUI PRO, XIAOMI EU,HAVOC OS, I have tried all of them and my device has RGB lights.
My device was purchased in MAY 2017 and model is MAI 132 just in case if you need information about it.
4.no touch issues on custom ROM but on MIUI(all versions) sometimes on charging I face touch issues.
5.dont know how to increase vibration intensity but check if there any root app available to do this.
metelhammer said:
1. Turn of lock screen, your device will not wake by fingerprint scanner touch unless you click power button or volume rocker buttons (if it's has been set to wake device) i am using DOT OS 2.4 and it's working fine.
Don't put tape
Click to expand...
Click to collapse
Thanks for interest. On LOS 15.1 when I disable lockscreen (going straight to desktop after wake), fingerprint scanner still wakes my device. It seems I will have to test other ROMs.
DoctorRzepa said:
Thanks for interest. On LOS 15.1 when I disable lockscreen (going straight to desktop after wake), fingerprint scanner still wakes my device. It seems I will have to test other ROMs.
Click to expand...
Click to collapse
It shouldn't have wake device, maybe its ROM dependent.
If you get any solution let us know if any case looking for the same, it'll help ?
DoctorRzepa said:
Thanks for interest. On LOS 15.1 when I disable lockscreen (going straight to desktop after wake), fingerprint scanner still wakes my device. It seems I will have to test other ROMs.
Click to expand...
Click to collapse
Why not try deleting fingerprints?
Sent from my vince using XDA Labs
Reykawick said:
Why not try deleting fingerprints?
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Click to collapse
I have no fingerprints added.
Try LOS 16 with firmware v042

fingerprint while display is off

I noticed that I can unlock the redmi k20 pro while the display is off. if I hit the fingerprint spot, the screen glows green on the corresponding area and it unlocks. (really conviniend)
Is this a 7th gen sensor feature, or do more phones have it? Or is it simply software?
A friends op 6t needs the display to be on for the fingerprint sensor to start checking, so I got curious.
Edit:
I mean under display fingerprints.
On pocof1 fingerprint reader was also always on , on my k20pro it also always on. when i had lineage installed on poco then you had to wake the screen to unlock so i think it software thing to have it always running in background
ef1x said:
On pocof1 fingerprint reader was also always on , on my k20pro it also always on. when i had lineage installed on poco then you had to wake the screen to unlock so i think it software thing to have it always running in background
Click to expand...
Click to collapse
Yeah, normal capacitive fingerprints should always work while the display is off, I was wondering about under display ones.
Also i saw option to enable like aod but with fingerprint reader that it always shows on locked screen

fingerprint reader freezes, wont register, and not responding

I bought my mi 9 2 days ago and it all worked fine. But today I've noticed that sometimes it will not register a touch, it stays as a fingerprint icon. Also, there was about 2 times it froze, like the icon froze while it was scanning, I had to unlock the phone by pin to get rid of it. Sometimes, I also notice that I have to press multiple times to get it to read, my finger is dead centre of the reader, but I still have to touch it multiple times. Anyone having the same issue or has a solution?
I also deleted and reregistered my finger multiple times. I'm on 10.2.13.0, btw.
I had this too until I added the same finger multiple times. Add the finger you are most comfortable with using as many times as you can.
When I do this it works almost every time, perhaps 19 out of 20.
10.2.13 here too.
I am able to reproduce the problem most of the times: having the phone in my pocket, I take it out and try to unlock. The reader does not respond, or it just lights and goes off cyclically as if it was retrying, yet no retry notification. If I doubletap to activate lock screen, it works like a charm.
Activating the rotation gesture to activate the unlock screen mitigates this, but other problems arise. If the phone is on the table, the only solution is to doubletap or to hit power to activate the unlock screen.
I read somewhere that it is a wakelock issue. I deoptimized the energy in the biometrics app via miappa, but the problem is still there.
Any solution?
chospo said:
10.2.13 here too.
I am able to reproduce the problem most of the times: having the phone in my pocket, I take it out and try to unlock. The reader does not respond, or it just lights and goes off cyclically as if it was retrying, yet no retry notification. If I doubletap to activate lock screen, it works like a charm.
Activating the rotation gesture to activate the unlock screen mitigates this, but other problems arise. If the phone is on the table, the only solution is to doubletap or to hit power to activate the unlock screen.
I read somewhere that it is a wakelock issue. I deoptimized the energy in the biometrics app via miappa, but the problem is still there.
Any solution?
Click to expand...
Click to collapse
Flash a custom rom. Xiaomi.eu fixes alot of problems with MIUI 10
kaydentc1 said:
Flash a custom rom. Xiaomi.eu fixes alot of problems with MIUI 10
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Click to collapse
What's the latest EU ROM version for the Mi 9? I'm a little bit confused on their site.
RebornCheiko said:
What's the latest EU ROM version for the Mi 9? I'm a little bit confused on their site.
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Get the latest pie build. 9.8.1

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