[Nexus 6P Q&A, Help & Troubleshooting] XanderMorris:
Incorrect PIN error

I have a strange issue with getting locked out of the phone, fingerprint/pin both not recognized.

Setup = MMB29M+cataclysm mod+SuperSU 2.62-3+ElementalX

I have not been able to diagnose what causes this but this issue has occurred twice so far (over 5 days or so). I will try to describe it as best as I can: I connect phone to an aux cable in the car to play music (yes ancient method). I use poweramp for music, set to pause/resume on headset/bluetooth connect/disconnect. I simply disconnect the aux cable once I reach my destination. First time around I received a text (sms) but phone didn't accept my fingerprint or pin. Second time around I got notified of a reminder (google keep) and again phone didn't accept my fingerprint or pin. Both occurred once I reached my destination and was trying to check notifications, after disconnecting aux

The only option is to factory reset via trwp, reflash the rom+su+kernel, then restore settings+TiBU app via google and reinstall all apps via TiBU - which is time consuming.

Second time around, after restoring everything poweramp crash report got generated, sent to developers, so I suspect it is to poweramp in conjuction with notifications while connected to aux but not sure.

Poweramp Crash report

New Trace collected :
=====================
Poweramp Error Report, collected on: Wed Dec 09 23:02:34 GMT+05:30 2015

==============

=========================
Version: full version
Store: Play
Skin: 7f090020
Device: Huawei Nexus 6P angler angler angler armeabi-v7a armeabi
Installer: null
Android: 6.0 MDB08M en_GB ART
Fingerprint: google/angler/angler:6.0/MDB08M/2353240:user/release-keys

Thread: 42 external api thread
Stack :
=======
java.lang.RuntimeException: Failure from system
at android.app.ContextImpl.sendStickyBroadcast(ContextImpl.java:1021)
at android.content.ContextWrapper.sendStickyBroadcast(ContextWrapper.java:509)
at com.maxmpz.audioplayer.player.PlayerService.ll1l(":3956)
at com.maxmpz.audioplayer.player.lll.handleMessage(":226)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
Caused by: android.os.DeadObjectException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:503)
at android.app.ActivityManagerProxy.broadcastIntent(ActivityManagerNative.java:3055)
at android.app.ContextImpl.sendStickyBroadcast(ContextImpl.java:1016)
... 6 more

Cause :
=======
java.lang.RuntimeException: Failure from system
at android.app.ContextImpl.sendStickyBroadcast(ContextImpl.java:1021)
at android.content.ContextWrapper.sendStickyBroadcast(ContextWrapper.java:509)
at com.maxmpz.audioplayer.player.PlayerService.ll1l(":3956)
at com.maxmpz.audioplayer.player.lll.handleMessage(":226)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
Caused by: android.os.DeadObjectException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:503)
at android.app.ActivityManagerProxy.broadcastIntent(ActivityManagerNative.java:3055)
at android.app.ContextImpl.sendStickyBroadcast(ContextImpl.java:1016)
... 6 more
android.os.DeadObjectException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:503)
at android.app.ActivityManagerProxy.broadcastIntent(ActivityManagerNative.java:3055)
at android.app.ContextImpl.sendStickyBroadcast(ContextImpl.java:1016)
at android.content.ContextWrapper.sendStickyBroadcast(ContextWrapper.java:509)
at com.maxmpz.audioplayer.player.PlayerService.ll1l(":3956)
at com.maxmpz.audioplayer.player.lll.handleMessage(":226)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
**** End of current Report ***

ADB commands work but nothing can bypass the security (which is good to know but doesn't solve my problem)

I am going to try and reproduce this (by setting another keep reminder to pop up at my destination, while I play music as normal).

a) Can someone tell me how to log/diagnose this issue?

b) Any advise on how to avoid this, as I don;t want to be doing this every so often

PS - I did not set-up security on stock recovery and then install twrp so we can cross that off the list as the culprit.

Thanks in advance for your help or advice...