do you have CSSU installed? i had this issue with QCPUFreq keep reverting to 500mhz minimum speed and governor was set to conservative. further, the scrollbar at the bottom of QCPUFreq was behaving strangely. as i drag it to the right, the max clock speed it would go past 1 ghz then drop back down to 250mhz and then up to 1ghz again. it wraps around.

i removed cssu, removed both speed+battery path, removed kernel-power. then reinstalled cssu, kernel power and finally speed+battery patch. the problem went away.