[Q] How to change governor in 4.3?

[t4n017]

I'm trying to change CPU governor, scheduler, max freq in Android 4.3 and it isn't working. It was working fine in Android 4.2.2 (CM 10.1) doing an 'echo' to the right files with the desired value. But now, in 4.3 (CM 10.2) it don't change the values, what could it be?