Fingerprint gradual malfucntioning to straight up No more Fingerprint

de0u

FixmePlzz I'm trying my hardest not to blame grapheneos for this... but I still love grapheneos, It's like a toxic dance...

Unfortunately these days phones are made out of hardware, and unfortunately these days hardware breaks. Screens can turn pink or start displaying green lines, touchscreen sensors can fail, CPUs can fail, GPUs can fail, DRAM can fail, flash storage can fail... and also fingerprint sensors. Sometimes the problem is something as simple as a loose cable from the fingerprint sensor to the motherboard.

Here is a randomly-selected Reddit thread about fingerprint-sensor problems: https://www.reddit.com/r/GooglePixel/comments/1bn3r4n/fingerprint_unlock_no_longer_an_option_on_my/ I see no hint that these people are running GrapheneOS.

At this point I'm as confident as I can be that you are experiencing a hardware problem with your fingerprint sensor. I am also fairly confident that the device needs a trip to a repair shop (unless you decide to junk it, which personally I wouldn't recommend at this point).

FixmePlzz

de0u after a reboot it works, its not a hardware issue, No and No

r134a

FixmePlzz In general hardware either fails instantly or symptons gradually get worse. For example i had a lg oled tv which one day turned off by itself out of the blue. 3 weeks later it couldn't stay on longer than 30 mins. Add another 3 weeks and the tv would power itself off after 10 sec consistently. It turned out to be a faulty oled panel.

Lilac6044

FixmePlzz How can you be sure it isn't a hardware fault? The fact you mention the problem appearing in stock os points to a hardware problem.

de0u

FixmePlzz To be honest, I am not following your reasoning/decision process, but I guess what matters most is whether it achieves the results you seek.

FixmePlzz

Not a hardware issue, rare firmware issue, the only solution is to run The Fingerprint calibration tool as many times until the fingerprint appears, or 4 times then rebooting and NEVER rebooting again, Now my sensor works fine, Even if my finger is wet, even if i don't press firmly, Not a firmware issue EVER.

FixmePlzz

Its just a stupid software issus, like fixing an old tv, you have to hit it from the back multiple times until it works, in this case, its rebooting as many times until it works AND stopping there.

n3t_admin

FixmePlzz its rebooting as many times until it works AND stopping there

yeah... that's a hardware issue. When the fingerprint scanner fails initialization (like POST for BIOS/UEFI systems), it is not recognized by the system, since it's being declared missing.
Good news is - you can replace the scanner standalone without replacing the display.
Hit up a local repair shop, they should be able to give you a quote. Or, if you have some experience with smartphone repairs, you can of course do it yourself.

FixmePlzz

n3t_admin then my Initialization software is bugging.

Yallweird

Trying recalibrating the fingerprint sensor. I think google has a tool you can find online.

FixmePlzz

Yallweird alrdy posted my solution which is to use it multiple times then reboot and NEVER reboot again when your fingerprint returns

Graymh

I've given up on fingerprint on my 6A and the pixel Tablet, both are useless. I've reset them several times, it works for a while then stops. I just a use a PIN.

FixmePlzz

Graymh ye and everyone here tries to force the idea that its a hardware issue...

n3t_admin

FixmePlzz because it is. Hardware can fail intermittently. Can depend on many factors, such as a broken flex cable, temperature, conductivity issues, corrosion and so on. There literally can't be a "software" or "firmware" issue like you're describing it. If it was, you would see a flood of reports.

FixmePlzz

n3t_admin "Hardware issue" disappears when I stopped rebooting... hmmmm

FixmePlzz

It no work...

n3t_admin

FixmePlzz what is "it"?

r134a

n3t_admin Probably the fingerprint sensor, the denial stage might have gradually passed and there might be a realization that what was thought here, probably is correct. If they want 'it' to work again, a repairshop as already suggested will probably be the best next step, or either just acceptance and proceed further with just a pin/passcode.

FixmePlzz

r134a By the way I dropped my phone BAD on its face, and guess what? FINGERPRINT IS BACK BABY!

MrQ

I have the same issue after the last update. Will try to reboot few times and see what happens.

FixmePlzz

MrQ i think its like 70% chance of being physical isue and 30% software, the pixel 7 pro is a hit or miss, but it dont matter cause my fingerprint is back

DeletedUser433

MrQ maybe u should try dropping ur phone on its face like FixmePlzz did

r134a

FixmePlzz I'm happy that u got it working again, although i suspect this might be temporarely, let's hope not. Perhaps the impact 'fixed' a bad connection on the flex cable or something.

FixmePlzz 70% chance of being physical isue and 30% software

Ah, makes sense! Perhaps the drop fixed some software bug aswell /s. Allthough there's progress in your conclusion.

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