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I read this topic here: Why won't my Raspberry Pi overclock?

but it seems a bit old to me and this line here

echo 60 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold

doesn't work because I dont have cpufreq inside /sys/devices/system/cpu. I also tried

echo 60 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold

but then I stop at missing ondemand folder in cpufreq.

Now my question stays the same as in that thread: Why does the Turbo not kick in? I did apt-get update apt-get upgrade and rpi-update many times so I guess I have the newest Raspbian on my RPi Model B.

The Turbo only works if I set

force_turbo=1

or

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

which both always forces to stay in the overclocked state. I want to use my Pi 24/7 but only overclock when unter hard stress, like somebody playing on the Minecraft-server. The empty server idles a lot and could save the heat.

Any good solutions how I could set the threshold lower?

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ecth
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1 Answers1

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Okay, I solved this. Made 2 mistakes. It should look like this:

# Here I forgot the quotes
echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

# This line should be AFTER the other one.
# If ondemand isn't set, you can't set it's threshold ;)
echo 95 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold

If the script stumbles over an error it just stops! So check everything twice, guys! :D

Interesting is that most tutorials tell that the default-governor is "ondemand" but for me it is "powersaving". That's why it was always taking the default or _min values.

Now it perfectly goes to the set _min value of 300 MHz in idle or low usage like a running Minecraft-server with no players on it. And jumps up to 1130 MHz when the performance is needed. It also feels smoother :)

ecth
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