Fingerprint Sensor on S9+ stops working completely everyday until I reset device

[Gary02468]

Go to lock screen and security/secure lock setting/secured lock time. Change timer to instantly. My fps works like a charm now. The 10 minute default setting disables the fps for 10 minutes. Odd setting - why would you want the fps to not work?

That setting determines how long it takes for the screen to lock in the first place after it turns off. When the screen isn't locked, you don't need the fps to unlock it.

But the OP was talking about the fps repeatedly ceasing to work while the screen was in fact locked. That used to be a widespread and prolonged problem on some previous S and Note phones, so it's not surprising (though it was disappointing) to see reports of the same problem for the S9.

 

[anon(1733)]

I would say yours is defective then. That's not normal for it to just quit working. I'd get it looked at. It's brand new.

 

[kmod75]

UPDATE:
I've got a patch from Samsung, which includes the March security update.
I've tested now with a call and the issue seems to be gone (even with fingerprint gestures enabled). So far so good.

Let's hope it's the end of it.

Did the patch come via an OTA software update? I have the unlocked version. How do I get the patch?

Thank you!

 

[steinjolt]

I hereby confirm that on my Galaxy S9 plus, after 1 week being flawless, suddenly (apparently related to an update) the fingerprint scanner failed. Every time the phone locks and Always on display starts, the phone crashes, turns off, reboots and cycles. I ENABLED safe mode, and the problem ceased, removed all the 3rd party apps and rebooted. Problem persists, I went and did a factory reset, and the phone worked again. The next paragraph is important:

After factory reset, the problem stopped, tested the phone and worked well, I went ahead and when I set up the biometrics again, after smart lock, while adding my fingerprints, there was a message: Fingerprint sensor is not responding, the phone crashed and immediatly died. I booted again, and readded my fingerprints, it worked again and scanned them. After that, the phone began to crash in Always on display, I disabled fingerprint scan for unlocking the phone, and the problem immediatly stopped. This started at 8 pm, its 5 am and I finally got it "not crashing"...for now. Also had to fully reset my Galaxy gear sport watch to pair it again. Terrible headache that came out of nowhere after an apparent update. Now I cant use my fingerprint to unlock my phone despite the biometric seems to work fine with my passwords and samsung account.

I tried to contact samsung support but they dont even have the S9 or S9+ in their supported devices list yet!

Im really really loving the phone, and will wait for a hotfix at least before going to my carrier and let them fiddle with my phone. Im just disappointed that this happened, that samsung support is outdated, and that there was no possible way to contact a human being and they left their entire support handled by bots.

Tl;dr = I turned off fingerprint sensor to fix the problem and use now my eyes or a pin to unlock it. Till theres a patch to fix it.

 

[steinjolt]

Update: Tried all the permutations in the Lock settings, and discovered that, Smart unlock, has a conflict with fingerprint scan, and AOD, if smart unlock and fps are on, when aod comes on the phone crashes, i tried iri with face and no crash, tried iris ans fps and no crash, tried face and fps no crash, tried smart unlock with fps and the phone crashes immediatly, turned on gestures and then off and the results are the same, tried immediatly screen lock and the results were the same, Im keeping Iris + fps + password with aod. Seems to be working now. Damn software conflicts.

 

[steinjolt]

Last update: It's all about the fps, been monitoring it all night long and the only way the phone doesn't eventually crash and reboots it's disabling fps. I'll post again when a fix is released. Hope this helps anyone.