All other parameters than sampling_rate seems to work OK in kernel-config.
I cannot degrease it from 150000, increase is possible.

I have tried to put i.e. 5000 to sampling_rate_min with root rights
echo 5000 > /sys/device/system/cpu/cpu0/cpufreq/ondemand/sampling_rate_min
but it is automatically changed back to 150000. What might be the reason?