[LAU] Scaling governor goes back to 'powersave' a bit after boot up

Hello, I have set the scaling governor to 'performance' by doing: echo -n performance For all 4 CPUs. After reboot, the scaling governor indeed shows: % date Sun Oct 22 08:53:49 EDT 2017 % cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor performance performance performance performance But then shortly thereafter: % date Sun Oct 22 08:54:06 EDT 2017 % cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor powersave powersave powersave powersave Which mechanism decides long after boot that the scaling governor should be modified and how to tell it that 'powersave' is not what we want ? Cheers.