Originally Posted by a2441918 View Post
Greenify is an app and is mainly used for maintaining a good battery life. U can find it in http://forum.xda-developers.com/show....php?t=2155737

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Thanks for the info. I'll give it a try. But I still would like to know which app is causing this...

And (weird), why only the 2nd core? It seems like a very specific bug.