How do I set scaling_governer to powersave mode (auto-cpufreq)

I have tried

# echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

# echo powersave > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

# echo powersave > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor

# echo powersave > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor

but its giving me "warning: An error occurred while redirecting file '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'
open: Permission denied"

My laptop is overheating due to this please help.

Just to be sure, you did it as root with sudo su as first statement, right ?

echo "powersave" | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

1 Like

I think the problem lies elsewhere if your system is running performance governor all the time. auto-cpufreq in my experience has been extremely good at keeping the cpu cool. Even with my 100 tab firefox open the governor never goes to performance.

Try this:

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