My screen do switch off after I wake it with power button. do you have any apps installed that use screen.
Sorry about the battery talk. That was not related to your issue, but more the people saying battery usage have gotten worse. In my experience so far this build is the best of the custom kernels so far.incl decent battery life
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Try wake up the screen with volume button, its not turning off again.
Sent from my MB526 using xda app-developers