MI 9 Fingerprint isn't working

[mppapad]

Hi all, I flashed the latest miui 12.5.0 Beta and the fingerprint registers arround 50% and then says can't add fingerprint for no reasson.. Also i tried callibrating the sensor thgrough the CIT menu and i get an error AUTO_EXPOSURE failed.. All other test successfully pass exept than one are passing without problems.. Does anyone know how to fix it?

 

[ZduneX25]

There is a FOD Boost magisk module for custom A11 roms, never tried it on MIUI, never had any issues with mine.

 

[mppapad]

I found a workaround that lets me register the fingerprint so I will post it for anyone facing the same issue.. It's a bit silly but when I add a pattern as a screen lock and try to add the fingerprint it works everytime! I used a numeric pin and it stoped registering new fingerprints.. So you can add them using a pattern and change to a pin or whatever again and it works flawlessly!!

 

[ihsaaan]

Happened to me.. I just flashed the ROM over the existing one and it got fixed