Unable to test app after upgrading to Lollipop

Question

I am using Android Studio to develop my apps.

Since I upgraded my HTC One M8 to Lollipop, I can not use it to test my apps by \"Run app\" in Android Studio. I get

Answer 1

I don't have the rep for commenting but i was in the same situation of @user47625 but my "Verify Apps over USB" was already off. I've tried to enlarge a bit this answer with some reasoning.

At first I've tried to change the launcher and I got some luck but was hit and miss, not a proper solution. Rebooting the phone granted a couple of hours of calm work.

Then i've found someone on google that stated:

If it is that bug: The DDMS client connects with a "Hello" when the PM process first starts and registers itself, but before it has fully initialized all the native code. It is a race in stock Android and occurs there too

So if this race occurs it doesn't occurs everytime, but every now and then, I suspect something regarding interaction of item on Android. I don't know if it's CPU, RAM or App related, but on my Zenfone 2 closing all background apps (1) and releasing the memory (2) does the trick, letting me able to debug the app properly.

I used Clean Master cause is stock with Zenfone 2, but i suspect every memory manager can do that. Give it a try