• Announcements

  • Workaround for Android 15 QPR2 fingerprint firmware glitch on Pixel 9 (non-Pro)

I've rebooted more than ten times, including leaving it off for 20 minutes. No fix for my Pixel 9.

Lilac6044 Yes, I just followed the same procedure, the fingerprinting functionality came back after 3-4 shutdown cycles. The first time it happened, I had to shut down 8-9 times, so it looks very random.
Version 2025030800

      Franco ah, okay. Thank you for the reply. I will carry on trying. I will update the thread if I get it working again.

        Mine is also gone after updating to the latest beta (Pixel 9). Has not (yet) returned following multiple power cycles and reboots.

        Fingerprint functionality is back, after what must have been 25+ powering off and back on throughout today. I am not too sure what triggers a successful reboot for the fingerprint reader to work on next boot... So it looks like the fix does not persist across sessions, and the advice to power off once for it to return does not work (at least in my case).

        Pixel 9 here, behaving the same as in other reports - fingerprint reader gone after update, several reboots later it starts to work. I captured logcat output of the failed and working states, and this appears to be the point where things fall off the cliff:

        Not working version:

        D ActivityManagerTiming: OnBootPhase_1000_com.android.server.biometrics.sensors.fingerprint.FingerprintService
D FingerprintProvider/default: Adding AIDL configs
D BiometricService: No fingerprint authenticators registered.
W FingerprintService: Null provider for getEnrolledFingerprintsDeprecated, caller: android
D BiometricDeferredQueue: Fingerprint addPendingLockoutResetForUser: 0
W PackageManager: Skipping preparing app data for com.android.hardware.biometrics.fingerprint.virtual
D SystemServerTimingAsync: ssm.onUnlockingUser-0_com.android.server.biometrics.sensors.fingerprint.FingerprintService
D SystemServerTimingAsync: ssm.onUnlockedUser-0_com.android.server.biometrics.sensors.fingerprint.FingerprintService

        Working version:

        D ActivityManagerTiming: OnBootPhase_1000_com.android.server.biometrics.sensors.fingerprint.FingerprintService
D FingerprintProvider/default: Adding AIDL configs
D FingerprintProvider/default: Added: com.android.server.biometrics.sensors.fingerprint.aidl.Sensor@9afee62
D BiometricScheduler: [Added] {[0] com.android.server.biometrics.sensors.fingerprint.aidl.FingerprintInternalCleanupClient, proto=7, owner=android, cookie=0, requestId=-1, userId=0}, new queue size: 1
D BiometricScheduler: [Starting User] {[1] com.android.server.biometrics.sensors.fingerprint.aidl.FingerprintStartUserClient, proto=17, owner=android, cookie=0, requestId=-1, userId=0}
D FingerprintProvider/default: Daemon was null, reconnecting
D Sensor : New fingerprint session created for user: 0 with hal version: 3

        Not sure if it helps, but maybe it will provide some clue to developers.

        Just after writing the above post, I disabled developer options and restarted. Fingerprint reader didn't work after reboot, requiring a few more (3 to be exact) to start working again. It looks like perhaps it is some race condition somewhere?

        Pixel 9 Build 2025030800
        The option was disabled for me as well. It was even gone in the Device unlock settings, so I couldn't enable it.

        After shutting down the device, and waiting about 2 minutes (the time it took to read this thread) I turned the device back on and it worked again.

        Imo, I think the issue may be more common.

        I have no problems with the fingerprint scanner on 2025030900 using my Pixel 6a, Pixel 7 and Pixel Tablet, everything seems okay with my 6th and 7th generation Pixels. (I don't have the other generations to test)

        Had the same issue on my Pixel 9, I just had to power off the device and waited for about five minutes until I turned the device back on, simple restarts didn't help. Now it's back and the option for fingerprint security reappeared in the settings menu

        Pixel 9 Build: 2025030900

        GrapheneOS My apple music app is somehow fucking with my fingerprint reader.... Sometimes it just disappears after some time having apple music open other times it won't do that. It drives me crazy... Running the latest GOS Version on a P8 Pro.

        GrapheneOS

            The main issue appears to be specific to the Pixel 9. It doesn't occur on the Pixel 9 Pro, Pixel 9 Pro XL or Pixel 9 Pro Fold.

              GrapheneOS changed the title to Workaround for Android 15 QPR2 fingerprint firmware glitch on Pixel 9 (non-Pro) .

              @GrapheneOS , you are mentioning that it is "a glitch occurring for certain Pixel 9 (non-Pro) users resulting in the fingerprint sensor not properly resetting itself after being updated"

              If this issue persists for an extended period, do you think a complete reinstallation of GrapheneOS would resolve it permanently? The rationale is that a fresh installation would ensure the fingerprint sensor receives the correct firmware version from the start.

              Currently, the issue is more of an annoyance than a major problem for me, but I'm asking in case it continues for weeks.

                Franco if it helps, I have tried this and still had the problem. So I would hold fire on reinstalling GOS as it does not seem to fix the issue.

                    Lilac6044 Thank you for your reply. In that case, we can only hope that the issue will be resolved upstream eventually.

                      My Pixel 9 is affected by this and I can't seem to get the sensor to come back. I am getting this error from fastboot oem udfps status:

                      $ fastboot oem udfps status
(bootloader) invalid sentinel 0x0
FAILED (remote: 'failed to print status -7')
fastboot: error: Command failed

                      The calibration image URL is this, which gives a 404 error.

                      $ fastboot oem udfps get-cal-url
(bootloader) https://storage.googleapis.com/hardware-mfg-data-ext-sacal/d9010017100086.signed.cal
OKAY [  0.001s]
Finished. Total time: 0.001s

                      Any chance someone with a working Pixel 9 fingerprint scanner can try those commands and paste their output?

                        NO FINGERPRINT option...

                        Just flashed a new P9 and it installed build 2025030900 from the website installer... and on first boot there was NO option to install a F. P. unlock... and in the settings it simply isn't there... I wonder if this is effecting more than first thought...

                        VAULT

                          I'm having this issue too. It seems to randomly occur. I seem to have better luck fixing this temporarily by shutting it down instead of rebooting it but it is completely unpredictable. Pixel 9 as well.