Dialer screen doesn't come up when making or receiving calls When I receive an incoming call the phone doesn't show the dialer/answer screen. If the screen is off already the phone rings but the screen does not come on. If the screen is already on and already dim the brightness will come back up, but the screen doesn't change. So if I was already on the home screen it just stays there. I cannot answer a call unless I use my Bluetooth headset to do so. It does this with or without the headset connected. If the headset isn't connected I cannon answer the phone.

If I hit the phone icon it comes up to the screen asking me if I want to return to the call in progress. I also noticed if I make a call it never comes up to the in call screen, so there is no way to mute, go to speaker phone, put the call on hold, or more importantly end the call.

This started shortly after upgrading to 4.4 from 4.3.

Android 4.4 Nexus 4
I disabled the Dialer app, cleared the cache, and the data. 
Rebooted the phone and enabled the Dialer app. 


Now all seems to be working well.