[Xiaomi Redmi 3 ROMs, Kernels, Recoveries, & Other ] dantefff:
In case it could help, here is the result of adb shell logcat | grep -i finger while unlocking my device.

D/FingerGoodix( 4030): go into while FingerPrint,getFingerPrintService()
D/fpc_fingerprint_hal( 319): capture_tac: Detected IRQ!
D/fpc_fingerprint_hal( 319): Finger detected
D/fingerprints_service( 4096): FPCD_CB_FINGERPRINT_MSG
D/fpcdclient( 4096): get_fingerprint_msg
D/fingerprints_service( 4096): callback FINGERPRINT_ACQUIRED: 64
E/FpcFingerprintManager( 3537): onMessage 2
D/FpcFingerprintManager( 3537): handleMessage what = 2
D/fpc_tac ( 319): fpc_tac_check_finger_lost begin
D/fpc_tac ( 319): fpc_tac_check_finger_lost end
D/fingerprints_service( 4096): FPCD_CB_FINGERPRINT_MSG
D/fpcdclient( 4096): get_fingerprint_msg
D/fingerprints_service( 4096): callback FINGERPRINT_ACQUIRED: 128
E/FpcFingerprintManager( 3537): onMessage 3
D/FpcFingerprintManager( 3537): handleMessage what = 3
D/fpc_fingerprint_hal( 319): Identify result 2 997 1 189384
D/fpc_fingerprint_hal( 319): Identify match
D/fingerprints_service( 4096): FPCD_CB_FINGERPRINT_MSG
D/fpcdclient( 4096): get_fingerprint_msg
D/fingerprints_service( 4096): callback FINGERPRINT_PROCESSED
E/FpcFingerprintManager( 3537): onMessage 6
D/FpcFingerprintManager( 3537): handleMessage what = 6
D/FingerprintHelper( 3537): VMStack.java getThreadStackTrace -2
D/FingerprintHelper( 3537): Thread.java getStackTrace 580
D/FingerprintHelper( 3537): FingerprintHelper.java cancelIdentify -1
D/FingerprintHelper( 3537): MiuiKeyguardUpdateMonitor.java onIdentified -1
D/FingerprintHelper( 3537): FingerprintHelper.java onIdentified -1
D/FingerprintHelper( 3537): FingerprintFPCImpl.java onIdentified -1
D/FingerprintHelper( 3537): FpcFingerprintManager.java handleMessage -1
D/FingerprintHelper( 3537): Handler.java dispatchMessage -1
D/FingerprintHelper( 3537): Looper.java loop -1
D/FingerprintHelper( 3537): ActivityThread.java main -1
D/FingerprintHelper( 3537): Method.java invoke -2
D/FingerprintHelper( 3537): Method.java invoke 372
D/FingerprintHelper( 3537): ZygoteInit.java run -1
D/FingerprintHelper( 3537): ZygoteInit.java main -1
D/FingerprintHelper( 3537): XposedBridge.java main 165
I/FingerprintFPCImpl( 3537): cancelIdentify()
D/FingerprintFPCImpl( 3537): releaseFingerprintManager()
D/FingerprintService( 4096): release
D/fingerprints_service( 4096): cancelNative
D/fpc_fingerprint_hal( 319): fpc_cancel
D/fpc_fingerprint_hal( 319): worker idle
D/fingerprints_service( 4096): releaseNative
D/fpc_fingerprint_hal( 319): worker idle
D/fpc_fingerprint_hal( 319): fpc_cancel
D/fpc_fingerprint_hal( 319): fpc_set_notify
D/fpc_fingerprint_hal( 319): fpc_set_enrol_callback
D/fpc_fingerprint_hal( 319): worker idle
D/FingerprintFPCImpl( 3537): set FingerprintManager = null
D/FingerprintHelper( 3537): VMStack.java getThreadStackTrace -2
D/FingerprintHelper( 3537): Thread.java getStackTrace 580
D/FingerprintHelper( 3537): FingerprintHelper.java cancelIdentify -1
D/FingerprintHelper( 3537): MiuiKeyguardUpdateMonitor.java stopFingerprintIdentify -1
D/FingerprintHelper( 3537): MiuiKeyguardViewMediator.java run -1
D/FingerprintHelper( 3537): Handler.java handleCallback -1
D/FingerprintHelper( 3537): Handler.java dispatchMessage -1
D/FingerprintHelper( 3537): Looper.java loop -1
D/FingerprintHelper( 3537): ActivityThread.java main -1
D/FingerprintHelper( 3537): Method.java invoke -2
D/FingerprintHelper( 3537): Method.java invoke 372
D/FingerprintHelper( 3537): ZygoteInit.java run -1
D/FingerprintHelper( 3537): ZygoteInit.java main -1
D/FingerprintHelper( 3537): XposedBridge.java main 165
D/FingerGoodix( 4030): go into while FingerPrint,getFingerPrintService()

And this are the services running regarding fingerprint (ps |grep -i fing):

system 4030 359 1695724 29940 ffffffff 9af7c240 S com.android.fingerprint

system 4096 359 1697216 33620 ffffffff 9af7c438 S com.fingerprints.service