Fingerprint not working ONLY on lockscreen. - Xiaomi Poco F2 Pro (Redmi K30 Pro) Questions & Ans

Hello,
Since i changed my motherboard, my fingerprint unlock sensor isn't working on my lockscreen.
When I put my finger in, the phone does the animation and vibrates but does not unlock. Even when I put a finger that is not added in the settings, I don't get an error, it vibrates and does the animation endlessly.
Nevertheless, on other applications (my bank's one, my password manager or even in the phone's settings to access some options (!!!)), the sensor works perfectly!
I went to check in the CIT, and the fingerprint tests pass perfectly. I even tried several times to recalibrate the sensor, but the problem still persists.
This problem happens on MIUI 13 China (stock) and xiaomi.eu rom, and i tried multiple times to do a factory reset but nothing.
What can i do?
Thanks.

same problem on pixel experience

rvxatt said:
same problem on pixel experience
Click to expand...
Click to collapse
My problem was resolved by MIUI 14.
I don't know why but when the phone vibrate, the fingerprint sensor won't work. MIUI 14 added the option to disable vibration when unlocking, and since my fingerprint sensor works perfectly.
Check if you can disable the fingerprint vibration on PE.

rvxatt said:
same problem on pixel experience
Click to expand...
Click to collapse
Your problem comes from the rom and not from Miui since it is an AOSP rom, post on the rom thread.

Related

Very weird fingerprint sensor problem

Hello all, I've been having a problem with the fingerprint sensor and have no idea where the problem comes from.
As you can see from my comment history, I had a problem with LOS15 being unable to find my fingerprint sensor. I thought it was a bug with the ROM so I just went back to OOS and thought nothing of it.
Today, I decided to do a clean install of Android 10 beta. Fingerprint isn't working again... I rolled back with latest fastboot OOS ROM, fingerprint still wasn't working.
Downloaded MSM and went back to stable 9.0.2 - fingerprint working. Updated it to 9.0.9 - still working. Updated to 10 - not working again.
Tried the same but went from 9.0.2 to Beta 25 and then flashing 10 again, fingerprint not working again.
I'm at a complete loss, dialing *#808# and doing both fingerprint tests shows the sensor is working, but nothing happens when I touch it. Now, I have to go back to 9.0.2 with MSM and then go back to beta 25. Lost the whole day thanks to this and still can't understand why it's doing this.
I am sure it is not because of the beta itself because noone else has mentioned anything in the OpenBeta thread and because it also happened when I tried LOS.
This essentially means I'm stuck at Beta 25 or stable 9.0.9 and also that I won't be able to use custom ROMs at all.
I had the same issue, it was faulty finger print sensor. Had to get it replaced
Iamshadderz said:
I had the same issue, it was faulty finger print sensor. Had to get it replaced
Click to expand...
Click to collapse
It can't be a faulty sensor, I think... If it was faulty then how does it work now when I got back on Android 9 ? It makes absolutely no sense and it's starting to make me hate this phone.

Proximity sensor and others not working properly after android 10 update

My Pixel 3's proximity sensor reads 0cm after android 10 update(using Sensors Multitool), and double tap to wake and lift to wake not working.
I've search on the internet and I read the post of "FIXED - Android 10 - Sensors Bug". and also tried using proximity sensor reset or calibrate app, but all seem not working.
In my case, all other sensors works perfectly(Active Edge,Ambient Light Sensor, Auto-brightness, Accelerometer, Auto-rotation), but proximity sensor have reading of 0cm all the time. Which make the screen black when having a phone call. And double tap/lift to wake is not working(although my accelerometer is working according to sensors multitool).
I don't have screen protector, and this problem happened just after i first updated it to android 10. so i think it might be just a software problem.
I had the october update already, but it is not fixed.
And this is a phone that never oem unlocked or rooted, no trwp installed ever, so it might be a different problem rather than that FIXED one.
I live in a country that I could not send the phone back for repairing or replacement, and i have to use adb sideload to install every ota
(and most of time when I switch my camera to frontfacing camera, it will buzz and vibrate, but when i switch back to rare and back to front, it can be fixed. this is another small issue, but it happened before this update already, maybe i just need to mention it)
Any idea what might cause this and how can I fix them?
Thanks.
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
TonikJDK said:
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
Click to expand...
Click to collapse
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
zhangcx93 said:
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
Click to expand...
Click to collapse
I factory reset my device yesterday and it fixed a lot of errors I was getting. Have you tried factory reset?
Be sure the phone has backed up to the google drive

Fingerprint sensor not works with miui11

I have a problem with the fingerprint sensor.. Since I switched to miui 11 with android 10 the sensor worked at times. It works for a day or two, then the menu disappears from the settings and i can no longer use it.
I try tu update vendor partition, wipe data, format data, reinstall new rom with all wipes, reinstall stock rom with Mi FlashTool, any solution works..When i wipe all, it works for a while and than, suddenly, doesn't work anymore!!
I have Mix 2S, i'm sure that is not an hardware problem..
Replace fingerprint sensor
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Kaliotto said:
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Click to expand...
Click to collapse
I had the same problem. Mi mix 2s had a problematic/bad assembly line.
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
This problem is very boring!!! Have you try a solution, or a temporary fix???
No, I have no idea how to fix. Seems we have to wait till the next update from Xiaomi, which hopefully will fix the problem. It is really boring.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
cdfs said:
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
Click to expand...
Click to collapse
I read on differents sites a lot of people who had problems with fingerprint sensor after upgrading to miui 11 with android 10..i don't think that all of us had hardware problem at the same time of the upgrading, it's very strange...
so, to avoid any doubt, i'm searching a new fingerprint sensor..the site suggested in the second posts seems to have problems with payment, any times i try to buy with paypal o credit card, the payment was refused..so i'm searching another reliable site..
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Jörg Krug said:
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Click to expand...
Click to collapse
So, you only disabled pin in the lockscreen (and set swipe method to unlock the phone)??
I tried now disabling pin and restarted the phone, but no options in the settings menu
Can you give me more details? Thanks
Update! After one day of use, I have to say, that the fingerprint sensor still does not work proper. After a while the fingerprint sensor stops working again. I played around with the settings, disabled the PIN protection and start the phone several times and than the fingerprint sensor was working again for a while. There is still something wrong. Also the CIT test sometimes pass and sometimes fail. Maybe it is hardware failure after all.
What I did: I disabled the password (PIN) protection, means no protection at all. After that I was able to run the fingerprint sensor test at CIT ( as cdfs wrote). This test was pass and the settings to configure the fingerprint sensor appears again in the system settings and the sensor worked for a while.
Since this procedure the function of the sensor is not consistent and I can not definitely say what to do to get it works. In the meantime I think that all the described workaround just works by accident.
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Try it yourself and give me your feedback
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Hello,
so I at the end found some users, having exactly that problem!
I bought a new sensor and changed it. Pixel Opem Test failed.
I bought another sensor with the same result: Pixel Open Test failed.
Is there a usefull solution?
Mi Mix 2s MiUi 12 xioami.eu
fefuzzo said:
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Click to expand...
Click to collapse
I had a try with twisted kernel V28.
Unfortunately it dind't solve the problem for me
meeven said:
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Click to expand...
Click to collapse
Hello currently I am using mi note 9 pro but I am having fingerprint issue there is fingerprint option missing I am not able to mange fingerprints. Plz somebody help me

Mi Note 10 weird screen issue (ghost touch?)

Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks
tibrocks said:
Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks
Click to expand...
Click to collapse
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.
ItsBen12000 said:
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.
Click to expand...
Click to collapse
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...
tibrocks said:
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...
Click to expand...
Click to collapse
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back
ItsBen12000 said:
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back
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Click to collapse
Right, so no fix really... disappointing as the cameras are impressive
My device came shipped with Android Pie Based Miui 11, no screen weirdness. Just after the Android 10 updates that ghost touches appear. So I guess it's just software bug.
me too, sure software problem.
Thanks for the feedback, if software-related were you able to roll back to fix this?
Happy to try a workaround as I'm very reluctant to send it back..
worth a try though, but unfortunately Xiaomi didn't provide stock ROM specifically for my region so I left with no choice
Completely puzzled as I did a Factory Reset via Recovery and haven't seen the issue for past 2 days, I've left the screen touch tracing on and no 'ghost touch' was recorded..
so I don't know what to believe anymore, got an open return ticket but would hate to send it back without needing to..
how can I make sure issue is gone?
Hi, i had this problem 3 weeks ago, temporary solved with hard reset, worked perfectly until yesterday night when this problem went back.
Hard reset again, problem still there.
Someone solved it permanently?
It is really weird because, if i turn off/on the display, sometime works sometime not :S
The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug
I'm using Mi note 10 lite it also has same problem. Sometime touch freezing and after press power button automatically fix. Some time need to restart. And also one person told me he is fixed by this issue by turned off fingerprint sensor.
UnlimitedBB said:
The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug
Click to expand...
Click to collapse
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.
BengCurd said:
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.
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Click to collapse
I am using the Pro version. Looks like this issue is common for all the phone models in the Note 10 series. Yes, I have noticed that this issue often happens at night.
Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy
CharlesJFRq said:
Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy
Click to expand...
Click to collapse
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue
UnlimitedBB said:
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue
Click to expand...
Click to collapse
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.
CharlesJFRq said:
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.
Click to expand...
Click to collapse
MIUI 11.1.3.0 Global Stable
Will try out the MIUI optimization to see whether issue still arise. I'll see if my game turbo have the same issue as you too.
I'm currently at 11.0.7.0 (Mi Note 10 Lite)
Edit: Mi optimisation doesn't work for me but the Game Turbo trick do work.

Reboot Fingerprint Module without Restarting

Hello there,
So my Xperia 5 lately has fingerprint scanner issue that won't respond to my fingerprints (on fingerprint sensor test it says 'Sensor Not OK'). This issue can be solved by restarting the phone (it's simple tips but take a lot of time for me). Does anyone know how to fix/reboot the fingerprint service on system without restarting the phone? Thanks
Regards
I had same issue. But after couple weeks with this problem my fingerprint scanner broke permanently. I dont think there is a solution for that. Tried to ask in many places.
respublikamroja said:
I had same issue. But after couple weeks with this problem my fingerprint scanner broke permanently. I dont think there is a solution for that. Tried to ask in many places.
Click to expand...
Click to collapse
Does the Fingerprint Manager menu disappear from the setting? If not, your fingerprint scanner still has a chance to work again. Try to restart the device again after several weeks.
alvathoni said:
Does the Fingerprint Manager menu disappear from the setting? If not, your fingerprint scanner still has a chance to work again. Try to restart the device again after several weeks.
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Click to collapse
Thx for Your advice but it is not true. Sony had problem with fingerprint sensor in Xperia 5 MK1
Xperia 5 Fingerprint Manager missing from settings
Hi Recently I've encountered problems with my fingerprint manager. Since the update it has completely gone from my settings menu on my Xperia 5. I spoke to someone from the team and they suggested backing up my phone and software repairing my phone. This didn't help one bit. And also erased...
community.sony.co.uk
I tried restart phone after several weeks. I have fingerprint manager in phone but sensor it is not working.

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