Workaround for Android 15 QPR2 fingerprint firmware glitch on Pixel 9

cadillyst

wellfuture I had the same experience with 2025040700 on my Pixel 9. I could not get the fingerprint reader to come on no matter how many power cycles. When restarted into 2025041100 the fingerprint reader was back.

DSJ009

I can also confirm that I got my fingerprint unlock back after updating the system from 2025040700 to current beta version (2025041100) on Pixel 9.
I just started getting used to unlocking the phone with a PIN but oh well ;) I hope there won`t be any other serious bugs in the beta update.

GrapheneOS

According to https://support.google.com/pixelphone/thread/337176484/google-pixel-update-april-2025 there was a fix for the fingerprint reader in the April 2025 monthly update.

Biometrics
Fix for issues with fingerprint recognition and response under certain conditions.*[1]

grayway2

ShinRamen247 nothing weird. Every time, I was not able to access a profile was because of wrong input of the password. I tried GrapheneOS on multiple pixels and can confirm that profile unlocking not possible with the right password does not exist.

You and your friend probably created a complex alphanumeric password and forgot it. It happens right way and sometimes a few days and even a month later.

pbasista

For what it is worth, I am currently using Graphene OS build 2025052000 on a Pixel 7 Pro and I a see no fingerpint option within the Device unlock menu.

The "Android security update" shows "May 5, 2025" for this version of Graphene OS so I believe it should include the upstream fixes from April 2025 where supposedly a similar issue should have been fixed.

It seems like it was not fixed in my particular case.

LiveByTheCode

It seems the 2025052000 update actually broke my pixel 9's fingerprint. I had no issues prior to this update. Now I can't unlock via fingerprint. I also tried deleting the print and setting it back up again. When attempting to set it up, it will register the first 4 touches then stops acknowledging touches entirely.

pbasista

In order to troubleshoot, I have also tried installing the latest stock OS for Google Pixel 7 Pro version 15.0.0 (BP1A.250505.005.B1, May 2025) from Google. But the fingerprint option does not show up there, either. The stock OS at least provides the face unlock feature so it is not that inconvenient to use.

I have also thought about the fingerprint sensor perhaps needing some calibration or something like that, at least in my particular case. So I have looked at some guides and tried using this possibly shady WebUSB app (which requires Google Chrome because of WebUSB) that is supposed to install some kind of "fingerprint calibration software". I went through the installation without any apparent issue. Rebooted the phone. And nothing changed.

There is no fingerprint option at all in my particular case. Not in the stock OS, nor in Graphene OS.

DeletedUser313

pbasista

What, you mean it's broken permanently?

pbasista

DeletedUser313 I do not know if it is broken permanently. All I know is that it is broken right now in my particular case.

I have also tried filtering the logs for messages related to fingerprint and indeed there are two messages about some failures related to fingerprint logged every second:

W ServiceManagerCppClient: Waited one second for android.hardware.biometrics.fingerprint.IFingerprint/default (is service started? Number of threads started in the threadpool: 32. Are binder threads started and available?)
W libc    : Unable to set property "ctl.interface_start" to "aidl/android.hardware.biometrics.fingerprint.IFingerprint/default": PROP_ERROR_HANDLE_CONTROL_MESSAGE (0x20)

Some people have been complaining about similar issues on Google Pixel 6 Pro a few months back on Google support forums. But there are no helpful answers or suggestions there that I was able to find.

kio19

I'm having this problem on Pixel 6. Build 2025052800.
Have shutdown 4 times already, but no biometry available anywhere.

pbasista

kio19 TGOS

If you can, please check your logs for fingerprint-related error messages:

adb logcat | grep -i "fingerprint"

If you are absolutely certain that your fingerprint sensor has worked before and stopped working after a software upgrade, you may try flashing the stock OS by Google. If you are able to reproduce the bug in there, you should be able to file an upstream bug about it directly with Google.

maricn

kio19 have you found a solution for p6p? i'm sorry for bringing this up, but my phone is complete trash - runs at 8-12% drain per hour and combined with https://discuss.grapheneos.org/d/24674-infinite-boot-loop-after-battery-drain/68 it's unusable as daily driver.. :(

i'm having these logs all the time:

W ServiceManagerCppClient: Waited one second for android.hardware.biometrics.fingerprint.IFingerprint/default (is service started? Number of threads started in the threadpool: 32. Are binder threads started and available?)
W libc    : Unable to set property "ctl.interface_start" to "aidl/android.hardware.biometrics.fingerprint.IFingerprint/default": PROP_ERROR_HANDLE_CONTROL_MESSAGE (0x20)

someone posted this already, but there's no answer https://support.google.com/pixelphone/thread/326705695?hl=en&sjid=2501392731574280702-EU

TGOS

June012006

GrapheneOS

Is there an update on this?
Got the same bug on my P9 2025052800

TGOS

pbasista

I'll do that as soon as I'm able to connect my phone to a solid computer, thanks for the tip

In seconds I was able to find it: https://issuetracker.google.com/issues/413594811

But wasn't really familiar with "upstream" issues

FixmePlzz

On a p7 Pro and i can confirm no more fingerprint option for me...

FixmePlzz

What can i even do... this thread is deserted

r134a

FixmePlzz I believe this thread was specific for pixel 9. Got resolved a while a go hence the thread being deserted. Since u have a pixel 7 u could make a new thread and perhaps include some information on what build u on etc.

Personally i think there's a high probability your fingerprint reader is toast.

FixmePlzz

r134a I doubt

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