Default [Q] [Help] Notification Lag and Other Issues

1. When i pull my notification, it's lag like hell... After im rebooting, it back to normal, but after a while (kinda 5 minutes) it lags again...
2. When im push the power button, the screen just flash and i cant see my lockscreen... After couple times i press it, it finally appear...
3. And also, my Android System draining my battery

Any solution?
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I'm from Indonesia, and sorry about my grammar
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Running AOKP ROM