Default CPU Governor

i usually use setcpu to set my cpu
i set max 800mhz min122mhz governor interactive and i/o scheduler noop
i have an l5 e610 stock v20d with root

i noticed with cpuz that when i change those value it work and it set them correctly but when i press power button and lockscreen appear it(probably the system) set as governor performance and after about 10seconds ondemand?????why??
i tried also no-frills cpu control but it do the same things, when i lock my smartphone

does the system(lg stock v20d 4.1.2) set automatically the governor? on lockscreen or boot(it do the same also after boot)
an app need a background services to re-set the cpu option?
LG L5 E610 KITKAT 4.4.4 CYANOGENMOD11 - Here to learn! OptimaTeam
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