Disable fingerprint sensor via proximity? - Xiaomi Mi A3 Questions & Answers

I have a Mi A3 and think it's great, but there is one issue I'm facing.. the fingerprint sensor is always active and when the phone is in my pocket and touches my leg, it wakes the screen after X failed attempts.
Multiple times I've pulled out my phone to find my leg has been typing numbers into the emergency dialler..
Is there any way (prefer no root - but so be it if needed..) to use the proximity sensor to kill the FP sensor? That way when it's covered in my pocket the FP sensor would be disabled and stop waking the phone all the time.
And before anyone says just put in your pocket with the screen out.. well that's just asking to get it smashed ?

Try disabling "show fingeprint icon when screen is off" feature.

Tried that one already. Unfortunately the sensor is still alive so if something touches it the phone attempts to unlock.
After a couple of attempts it seems to turn on and show buttons for emergency dialler / pin unlock.

Not sure if this would be usable on A3, but you could try this approach:
https://android.stackexchange.com/questions/153948/completely-disable-the-fingerprint-sensor
Edit: just tried it on my A1. I can disable the FP sensor with:
Code:
echo soc:fpc1020 > /sys/bus/platform/drivers/fpc1020/unbind
BUT, can't get it back yet (only with reboot): this should be the correct command, but it doesn't do anything
Code:
echo soc:fpc1020 > /sys/bus/platform/drivers/fpc1020/bind

Custom ROMs have something like pocket mode that detects and prevents it don't they? I wish something like that would be available for stock as well. Wouldn't mind root.

I have the same problems with scanner acting in a pocket. Looks like I have to disable scanner for now. This can be done by removing recorded fingerprints from settings.

As a workaround for emergency dialing, you can use WaveUp app and set it to lock with proximity sensor. It probably won't prevent fingerprint readings, but at least the display will turn off in your pocket. Works best with root, I'm using it on Mi A1. "Turn display on when removing from pocket" feature is highly addictive. I use HW power button mainly for taking screenshots now..
Edit: Tasker with states "proximity sensor and orientation - phone upside down" and task "display - turn off" can do the same if you want to keep it simple.
Edit 2: Nicer Tasker profile, turns screen off only when the screen is locked (prevents accidental locks while using the phone):
Profile 1 - state "proximity sensor" + state variable value "%SCREEN_LOCKED ~ true", task "display - turn off"
Profile 2 - event "display unlocked", task "variable set, %SCREEN_LOCKED to false"
Profile 3 - event "display off", task "variable set, %SCREEN_LOCKED to true"
Turn display on&off with power button and you are good to go.

Thanks will give the commands a go when I get chance and see if it works on the A3.

put you phone opposite side .... screen upwards in pocket.

hi this feature works on my device when i turn off the proximity sensor the fingerprint icon does not show up on the screen

I have this problem too with Android 11.
I wanted to try the method with fpc1020 driver. The driver is here, but what is weird, that in /sys/bus/platform/devices is not such device attached :/

The easily way to do this is root the phone. After this you can disable all useless features

wetito said:
The easily way to do this is root the phone. After this you can disable all useless features
Click to expand...
Click to collapse
I have rooted phone but you probably doesn't understand the problem.
I don't want to completely disable fingerprint, I just want the FP to be disabled by proximity sensor, because it's bul*** to have enabled FP in pocket...

Benik3 said:
I have rooted phone but you probably doesn't understand the problem.
I don't want to completely disable fingerprint, I just want the FP to be disabled by proximity sensor, because it's bul*** to have enabled FP in pocket...
Click to expand...
Click to collapse
There"s a quick setting to add by developer settings that disable all sensors. Have you tryed? Maybe it work

Related

[TASKER] Help with proximity sensor conditionals and wifi profiles

Hi
Tasker begginer here.
I'm having some minor issues with Tasker that I was hoping you could help me sort out:
I use Greenify and I was having a little problem with autohibernation feature in my unrooted Nexus 5: The screen has to turn on in order to automatically greenify something. This is a problem when the phone is in my pocket or facing down on the table because it conflicts with Gravity Screen (this app turns the screen off -and keeps it off- when the proximity sensor is active and the device is in a particular orientation), so when the phone is in my pocket or laying face down on a surface, Greenify can't finish its job because Gravity Screen will quickly turn the screen off.
In light of this, I disabled the autohibernation feature in Greenify and made a rather simple group of profiles to control it from Tasker. The main profile, the one that calls the "Hibernate now" shortcut from Greenify, is triggered when the screen turns off and has and If condition. This is the logic of that if:
- If
Proximity sensor: Not active
AND
Screen off
- Then
Run task
I do this to make sure that the hibernate action is not triggered while the screen is on or while the proximity sensor is active. Since Tasker doesn't have a variable for monitoring the proximity sensor, I made a profile that sets a variable (%PROX) to 1 when it's covered and 0 when its uncovered. So the if conditional uses the value of %PROX.
The problem is that if I turn the screen on WHILE the proximity sensor is active, Tasker skips the if statement (as it should), but if I turn the screen off with the proximity sensor uncovered and then cover it, it'll run the task. It's as if the profile that sets the variable %PROX to 1 does not work while the screen is off. Is this normal behaviour? How can I make this work better?
I managed to sort this out by deactivating Gravity Screen at the beggining of the task and reactivating it at the end (with a little waiting to give Greeenify time to finish), but I still want to keep my screen off while the phone is in my pocket.
My other doubt is regarding a group of profiles (that I got from here) that turn Wi-Fi on whenever I'm near two locations using the cell tower and Wifi near state in Tasker. I made some minor adjustments to these profiles, but they're still basically the same. The problem I'm having is that, most of the times, these profiles won't do anything if the screen is off. For example, I have it set to recognize cell towers near my house (and of course my Wifi connects automatically). Let's say I get home and I haven't used my phone in a while (screen off), I'd expect to see my Wi-Fi on and connected some time after I arrived, but this is not the case. It is not until I turn the screen on AND unlock the phone that I see the profiles doing their thing. I see wifi connecting, flash alerts and so on. This probably have something to do with the fact that, for some reason, my phone will not connect to a network while the screen is off. Same example, I get home with wifi on and the screen off, and I'll only see the wifi connecting after I turn the screen on (this happens with or without Tasker and with any wifi) regardless of how long I've been home.
Could it be that the near wifi profile cannot toggle wifi or can't recognize any network while the screen is off due to this bug I have with Wifi connections in my phone (Which I haven't been able to sort out)?
Thanks in advance and sorry for the long post!
Help with wifi profile
Hi, i saw your post in here and i think i can help, do you still have that problem or you managed to fix it? I think I might be able to help you

Fingerprint sensor acts like unlock button

Hi guys,
I have received an update lately (MIUI Gloval 8.1 Stable - 8.1.1.0) and my struggle began. My problem is that now every time if I touch the fingerprint sensor the phone unlocks. It's REALLY annoying guys. Sometimes I lock my phone and put it down and the screen unlocks because accidently I touched it. Fingerprint is disabled, furthermore I have no lockscreen whatsoever have enabled. The fingerprint sensor at the back acts exactly like the unlock button on the side. How the hell can I disable this annoying function?
Thanks !!!
Settings - Lock Screen & Password - Manage Fingerprints - Enter Password if you have one - Apply Fingerprint to Lock Screen - choose disable?
Fingerprint wakes up the device if u haven't added any fingerprints.
That's a thing in marshmallow MIUI (even on the beta builds), it's not a bug, tapping on fp without any registered FPs wakes up the screen.
Furthermore, u said that there's 'NO LOCKSCREEN' you kept(so i assume there's neither swipe to unlock screen) so fp is waking your device everytime,and consequently,screen gets unlocked.
I see. Any way to completely disable this function? I dont want that sensor to work at all.
Me too, I have the same problem, the fp sensor wakes up the screen when I'm touching it accidentally most of the time. How can we disable this annoying "feature"?

LG V30 always on display and KnockON features in low light don't work

Hello,
I'm experiencing a weird problem with my LG V30 H930 and I was wondering what could be the solution, if anyone has ever experienced that as well?
Yesterday I received a new LG V30 phone and that day I found something very disturbing. The "always on display" function does not work when it's too dark in the environment or when I cover the light sensor. This also results in:
- "double tap to wake" function does not work when it is too dark
- holding finger against the screen results in turning off display instead of entering options for changing wallpaper, adding widgets and settings. Additionally when I turn off the screen in this way, I need to press the button on the back of the phone twice, which is also a fingerprint reader and at the right time. If I do it too slowly, i.e. press the button once, wait a bit and then the second time, the screen will not turn on. I have to press it twice and relatively quickly
All of this does not happen when it is bright in the environment.
The phone's never been rooted, there is no custom firmware loaded on it, I've tried many times going back to factory settings.
Lovatnet said:
Hello,
I'm experiencing a weird problem with my LG V30 H930 and I was wondering what could be the solution, if anyone has ever experienced that as well?
Yesterday I received a new LG V30 phone and that day I found something very disturbing. The "always on display" function does not work when it's too dark in the environment or when I cover the light sensor. This also results in:
- "double tap to wake" function does not work when it is too dark
- holding finger against the screen results in turning off display instead of entering options for changing wallpaper, adding widgets and settings. Additionally when I turn off the screen in this way, I need to press the button on the back of the phone twice, which is also a fingerprint reader and at the right time. If I do it too slowly, i.e. press the button once, wait a bit and then the second time, the screen will not turn on. I have to press it twice and relatively quickly
All of this does not happen when it is bright in the environment.
The phone's never been rooted, there is no custom firmware loaded on it, I've tried many times going back to factory settings.
Click to expand...
Click to collapse
Why are you covering the light sensor if you want the AOD on?
You are basically replicating a flip case cover or flipping a phone over on the desk. Of course the AOD will turn off under those circumstances. There's nothing wrong with your phone.
With your display on, just quickly press your finger on the fingerprint sensor to display lock the phone and you will see AOD. Well you also have need the "power key instantly locks" option turned on. But I assume you have that on already.
Of course the AOD works in a dark environment. But in this instance, you are covering the light sensor -- which tells the phone you must have it in a flip cover case or flipped over. When you open the case or flip the phone back on, the AOD comes back on. In your fake way, you must be doing something wrong.
Stop covering the light sensor.
ChazzMatt said:
Why are you covering the light sensor if you want the AOD on?
You are replicating a flip case cover or flipping a phone over on the desk. Of course the AOD will turn off under those circumstances. There's nothing wrong with your phone.
Just quickly press your finger on the fingerprint sensor to display lock the phone and you will see AOD. Well you also have need the "power key instantly locks" option turned on. But I assume you have that on already.
Click to expand...
Click to collapse
I understand your logic, but it is a very weird feature then, not to be able to change wallpaper directly from the home screen, when it is dark in the room or not to be able to turn on the phone double-tapping the screen, which is turned off. Is it perfectly normal as well?
Lovatnet said:
I understand your logic, but it is a very weird feature then, not to be able to change wallpaper directly from the home screen, when it is dark in the room or not to be able to turn on the phone double-tapping the screen, which is turned off. Is it perfectly normal as well?
Click to expand...
Click to collapse
You can change wallpaper and double tap the screen, but go to AOD mode in a NORMAL way. I told you how. Just turn off the display with the fingerprint sensor. AOD. Double tap, display back on.
ChazzMatt said:
You can change wallpaper and double tap the screen, but go to AOD mode in a NORMAL way. I told you how. Just lock the display.
Click to expand...
Click to collapse
Thank you for your time!

Question Fingerprint sensor

I don't know anything about how under-screen fp readers work, but... Is there no way to use it when the screen is off?
On previous phones I always used the fingerprint sensor to turn on and unlock with one touch, but this N20 5G seems to only fp-unlock when A) The screen is on, and B) The "fingerprint goes here" icon is visible.
The screen will usually turn on when I pick up the phone ("Somatic Gesture"); the fingerprint icon then appears for a few seconds, then goes away. That seems to be the only window for unlocking without clicking the power button.
Am I missing a trick?
I use double tap to wake and it works great. The sensor stays lit up for about 7 full seconds before going black. YMMV
Good point, double-tap to wake was disabled by default!
Still two more taps than I'd prefer to get to the fingerprint unlock, but I guess that's more a reflection of how incredibly lazy I've become than a problem with the phone.
Florp said:
I don't know anything about how under-screen fp readers work, but... Is there no way to use it when the screen is off?
On previous phones I always used the fingerprint sensor to turn on and unlock with one touch, but this N20 5G seems to only fp-unlock when A) The screen is on, and B) The "fingerprint goes here" icon is visible.
The screen will usually turn on when I pick up the phone ("Somatic Gesture"); the fingerprint icon then appears for a few seconds, then goes away. That seems to be the only window for unlocking without clicking the power button.
Am I missing a trick?
Click to expand...
Click to collapse
It works for me

Question Fast unlock doesn't (?)

Coming from a OP5 with a separate fingerprint sensor (rather than under display), I'm used to being able to unlock the phone just by placing a finger on the sensor - even when the display is off.
On the 10T, the sensor only seems to work with the display is on, so I need to jiggle the phone a bit too wake it and then present my finger.
I found a setting 'fast unlock' which reads like the sensor is always active however I can't see any difference and pressing when the screen is off does nothing.
Anyone seen this / know how to get it working?
(For context, this is mostly an issue when I leave the phone on the desk and want to check something without moving the phone. If I pick it up then it wakes up and sensor works as expected)

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