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

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.

                    GrapheneOS FWIW, I've been unable to fix the issue permanently. Every so often it goes away when I boot the phone back up and remains fixed until the next reboot, but I haven't been able to have it go away completely.

                        Pixel 8 fingerprint can be used to unlock screen. The fingerprint for apps in personal profile need to be setup again. In the work profile its not possible to set up the fingerprint unlock for apps. I always recieve an error.

                          After many many times of reboots, sadly my fingerprint isn't back yet. Seems like i hit the jackpot.

                          tavianator
                          I ran these commands in fastboot mode and get following logs on both of them:
                          FAILED (remote: 'Unable to do OEM command Status(-8, EX_SERVICE_SPECIFIC): '1: Error Unknown OEM command'')

                          My fingerprint failed to but after rebooting many times (stopped counting on 16 times) it worked again, but the last reboot after it worked again my phone rebooted itself while I wanted to unlock my SIM.