Why won't my screen turn off after installing 4.4.2?

[kiki_b18]

I updated my phone a while back to firmware 4.4.2 and now my screen will not shut off or go to the lock screen. Pressing the button does not do anything. The auto time out on the screen is set for only a few seconds and does nothing. I can only get to the lock screen after the phone has been restarted.

I've been patiently waiting for an fix, but that does not seem to be coming. To make matters worse, I have not been able to use the Kies software to backup phone since this has happened. It says my device is not supported.

 

[B. Diddy]

Welcome to Android Central! Does this only happen when plugged in and charging, or even when unplugged?

Try wiping the cache partition, which won't erase any personal data: http://forums.androidcentral.com/sa...ing-into-recovery-mode-galaxy-s2-s3-tab2.html

 

[kiki_b18]

Yes, it happens all the time. It doesn't matter if it is plugged in or not.

 

[kiki_b18]

I just wiped the cache partition and it fixed it! THANK YOU SO MUCH. I can't believe that was all it took! This has been a huge headache for me. You're amazing!

 

[B. Diddy]

Great! Let us know if the problem comes back.

 

[kiki_b18]

I still have a notification that keeps popping up saying "Security Notice. Unauthorised actions have been detected. Tap here for more info." It wants me to restart my device which does nothing. I've had this since I installed that firmware upgrade too. Is there anything that can be done about it? It's annoying but at least my phone is much more functional now.

 

[B. Diddy]

Did you root the phone? I wonder if something tripped Knox security.

See what happens if you go to Settings>Security and Clear Credentials.

 

[kiki_b18]

"Clear Credentials" is greyed out, so I can't click on it. I haven't rooted my phone or messed around with it at all. I've been a pretty basic user with it actually. Thanks

 

[B. Diddy]

Is this notification appearing in the notification panel, or is it a popup? If its in the notification panel, long-press it, then tap App Info to find out what is giving you the notification.