1

Device - HP 23-q010e

Kernel - 4.4.0-64-generic

Heres what I've tried:

No way to lock the CPU-frequency to a specific value

The above link only talks about setting the cpu freq on the current boot, but if you reboot, your settings are back to default. So I thought about going to Applications>System Settings>Applications>Startup and adding custom command: 

cpupower -c all frequency-set --max 1.3ghz
/usr/bin/cpupower -c all frequency-set --max 1.3ghz

Neither one works.

https://askubuntu.com/questions/523640/how-i-can-disable-cpu-frequency-scaling-and-set-the-system-to-performance

I've also tried the above setting /etc/init.d/cpufrequtils. No matter what I set the frequency to, doesn't work.

https://blog.sleeplessbeastie.eu/2015/11/09/how-to-set-cpu-governor-at-boot/

The above works great for Manjaro, but not Elementary OS.

I've also tried inserting the cpupower command into /etc/rc.local:

/usr/bin/cpupower -c all frequency-set --max 1.3ghz
cpupower -c all frequency-set --max 1.3ghz

exit 0

and

sh -c /home/ed/Documents/rclocal &;

exit 0

Maybe this is why rc.local doesn't work for Elementary OS:

Failed to start /etc/rc.local Compatibility.

Please explain in lamen terms.

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1 Answer 1

Reset to default
3

Install TLP 

 sudo apt install tlp

Then edit the config file - set the governor to powersave

 sudo scratch-text-editor /etc/default/tlp

Ensure the following lines are not commented and are as show below

CPU_SCALING_GOVERNOR_ON_AC=powersave CPU_SCALING_GOVERNOR_ON_BAT=powersave

or

Try setting the CPU governor to performance. This will "lock" the CPU to max speed.

Install cpufrequtils

 sudo apt-get install cpufrequtils

Then edit pr create the following file

 sudo scratch-text-editor /etc/default/cpufrequtils

And add the following line to it

 GOVERNOR="performance"

Save and exit

Then disable Ondemand daemon to keep your settings on reboot

 sudo update-rc.d ondemand disable

Check your settings with

 cpufreq-info

If this doesn't work for you, you can try what's listed here

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6
  • That worked for the governer, but what about frequency? In that same file I've tried: MAX_SPEED="1ghz" and MAX_SPEED="1000000". To no avail. I guess my question could be revised as this: How to run an administrative command at startup.
    – Jeff Luyet
    Commented Mar 8, 2017 at 4:16
  • With the governor set to Performance it will run your CPU at it's max freq all the time. Is that not what you are seeing when you run cpufreq-info?
    – pretz
    Commented Mar 8, 2017 at 12:36
  • Yes it is what I'm seeing. The max frequency is 2.2ghz. I don't want 2.2ghz I want 1.3ghz. Ok so.. I tried to set it to powersave, which would make it run 1ghz only. But the problem is, the file /etc/default/cpufrequtils does nothing. The only thing that worked in what you said was this: sudo update-rc.d ondemand disable. Doing that disabled the ondemand which disabling the ondemand I guess the computer picks performance governer next by default.
    – Jeff Luyet
    Commented Mar 8, 2017 at 14:21
  • Oh I see you don't want it locked at max. Sorry I misread. What you might try is installing TLP and editing the config file to force the powersave governor. I've had mixed results with that on eOS though but worth a shot.
    – pretz
    Commented Mar 8, 2017 at 14:44
  • BOOM, TLP is the answer. Inside etc/default/tlp I changed CPU_SCALING_MAX_FREQ_ON_AC=1300000. Now my frequency is 1.3ghz. I was also able to change the governor here as well by CPU_SCALING_GOVERNOR_ON_AC=ondemand. If you edit your answer I'll +1 you if I have enough points, if not then I can give you a check. Thank you!!!!
    – Jeff Luyet
    Commented Mar 8, 2017 at 16:31

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