Default [Q] Reset max freq overclock setting to 1200 MHz after screen off on 4.1

With stock 4.1 and franco r210 for jb,

When I use setCPU to set cpu frequency max 1600 min 350, it can apply this setting.
see attached picture 1

But after screen off and on, I open setCPU to see that the max frequency setting is restored to 1200MHz...
see attached picture 2

Is that Project Butter side effect ?
How can I keep max cpu frequence on 1600 after screen on from screen off ?
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