CPU Frequency, or CPU Frequency Scaling. This is implemented in the Linux kernel, and in versions since 3.4 use an ondemand governor by default, which saves power by using as much as is needed.

learn more… | top users | synonyms

0
votes
1answer
82 views

TLP don't change CPU frequency

I check CPU clock speed with cat /proc/cpuinfo | grep "MHz", After sudo tlp start and sudo tlp bat still frequency is 2100MHz (Maximum). Could you please help me to solve this problem? I'm using ...
0
votes
1answer
73 views

Reduce CPU frequency in battery mode automatically

Is there any way to do that? Something like xbacklight and Cuttlefish
0
votes
0answers
79 views

Ubuntu 14.10 Using intel_pstate

I have stumbled upon this question (Why are missing the frequency options on cpufreq-utils indicator?) while trying to solve the same problem and the answer provided seemed to be showing how to ...
0
votes
1answer
86 views

indicator-cpufreq not working with kernel 3.17?

indicator-cpufreq have just two option (powersave and performance) after upgrade to kernel 3.17. Is there any way to fix it? I reinstall this program but still have same problem.
1
vote
1answer
159 views

indicator-cpufreq always shows only one bar on Ubuntu 14.10

On Ubuntu 14.10 the indicator-cpufreq always shows only one bar. I can switch between Performance and Powersave but the indicator icon never changes. It always shows only the one most bottom bar. I ...
0
votes
0answers
58 views

indicator-cpufreq set cpu frequency to maximum value when wake up from suspend/hibernate

When the laptop wake up from suspension/hibernation, I lost the profile or the cpu frequency previously selected. For example, if I select 1.20 GHz profile and suspend the laptop, when it wake up the ...
0
votes
0answers
70 views

Overclocking with Ubuntu

I overclocked my CPU in BIOS using a multiplier. Everything in Ubuntu still shows the CPU frequency is stock. Is the CPU running at stock frequency, or is it overclocked like it's supposed to be? Is ...
0
votes
0answers
82 views

My CPUFreq Governor switch to performance without being asked to

I'm using Ubuntu Gnome 14.04 on my laptop. When on AC power, my scaling governor switches to Performances while I didn't ask it to. I have laptop-mode enabled with the cpufreq module active and the ...
0
votes
0answers
102 views

Ubuntu 14.10 abruptly shuts down when in Turbo Boost Mode

I have an Alienware 17 with Intel i7 4700MQ processor. I recently did a clean install of Ubuntu 14.10 and have been facing abrupt shutdowns when cpu usage reaches 100% on all cores. This issue arises ...
3
votes
2answers
668 views

Why are missing the frequency options on cpufreq-utils indicator?

I just upgraded to utopic and the indicator for cpufreq-utils just show two cpu frequency options: Power save and Performance. Before in trusty: Now in utopic: Regards.
3
votes
0answers
173 views

How to set governors for Intel to work as old good ondemand?

I used to work on my laptop on ondemand governor, which was switching CPU frequency depending on CPU usage. It worked quite nice for years and had three very important advantages: low hardware ...
4
votes
1answer
1k views

`indicator-cpufreq` doesn't seem to work on 14.10

I have a Dell XPS 12 and just installed Ubuntu 14.10 (by completely wiping out the old 14.04 installation). The indicator menu has 2 options, Performance and Powersave, from which I choose ...
1
vote
0answers
90 views

After upgrading my CPU cpufrequtils does not work

After upgrading my CPU (nothing else changed on my system) I can't change the governor of my CPU. I tried reinstalling cpufrequtils, but got the following error: Setting up cpufrequtils (008-1) ... ...
1
vote
3answers
191 views

How can I tell how fast the CPUs are running on a POWER8 server?

I'm running with Ubuntu 14.04 on a Power8 server. Is there a way to tell how fast the processors are running? How do I enable the tools that come with powerpc-utils and cpufreq ? added.... ...
0
votes
2answers
312 views

Can I use TLP and CPUFreq at the same time?

I just started using ubuntu 14.04 recently. I read that it's good to have CPUFreq or TLP. I was wondering if it would be okay to have both. Would it cause any problems with the computer performance if ...
0
votes
2answers
443 views

Why is my CPU Frequency stuck?

After recent routine upgrades, I've noticed that I'm unable to change my CPU frequency manually. The system is doing it automatically, and choosing the highest frequency possible, which causes it to ...
0
votes
1answer
482 views

how do I enable AMD Turbo Core the cpu on my acer aspire 7560?

I have an acer aspire 7560 that on windows supported (through acer proprietary software) boosting the cpu from 1.9ghz to up to 2.5ghz for long periods of time so long as there was adequate cooling. On ...
0
votes
2answers
172 views

Turbo core not working

I got ubuntu 14.04 on hp pavalion g6 with an amd apu a6 llano which has a stock frequency of 1500mhz and is capable of boosting to 2400mhz. But on my system it's turbo boost feature is not working.
0
votes
0answers
37 views

How to allow a process to have full cpu usage?

I just want to speed up the response time of a process by letting it use the full cpu not only %50 of like it's happening in my case. I want to know if there is a command similar to make -j4 to speed ...
0
votes
1answer
104 views

Refresh indicator-cpufreq

Is there a way to refresh indicator-cpufreq / cpu frequencies after enabling a pstate on the cpu(without reboot)? Thank you.
3
votes
1answer
1k views

ubuntu 14.04 - only performance and powersave governor available (i5 4.gen)

After updating my ubuntu 13.10 to 14.04 there only these to govenors available for my cpu, instead of additionally ondemand and conservative. cat ...
1
vote
0answers
240 views

Cannot load acpi_cpufreq module [closed]

I have been trying hard recently to scale my CPU Frequency from 1GHz (the current frequency) to 1.67 GHz (the maximum frequency) but it won't let me as when I execute sudo cpufreq-set -u 1.67GHz it ...
3
votes
2answers
2k views

How to enable AMD Turbo Core on Ubuntu 14.04?

I'm using Ubuntu 14.04 (3.13.0-24-generic kernel) on AMD A8-4500m based laptop, and I've recently noticed, that AMD Turbo Core is not working at all. Everything works on Windows, however, on Linux CPU ...
3
votes
2answers
4k views

CPU Turbo boost: modify temperature limit under 14.04

I've installed kubuntu 14.04, and there is some problem with CPU turbo frequency. I've read a lot about it, but can't find the correct answer. There is an i7-3630QM CPU @ 2.40GHz with 3.20GHz turbo ...
5
votes
1answer
7k views

how to run cpufreqd in ubuntu 14.04?

I've just installed cpufreqd in a fresh installation of Ubuntu 14.04 through: sudo apt-get install cpufreqd After that, I tried to execute it by sudo cpufreqd. But nothing happens (neither error or ...
1
vote
2answers
222 views

lscpu output differs when called indirectly?

I use lscpu | grep 'MHz' to get my clock speed. I am getting different results based on the method I am calling this command. Method 1: typing it in the terminal CPU MHz: 1200.000 Method 2: ...
2
votes
2answers
996 views

AMD Turbo Core not working - Change CPU driver?

I Got an AMD FX(tm)-8350 Eight-Core Processor with 4GHz frequency and up to 4,2 GHz Turbo Core speed, but I cant get the Turbo Core to work. dmesg | grep powernow should tell me something like: [ ...
1
vote
0answers
157 views

modprob acpi-cpufreq problem

I am trying to enable cpu frequency scaling. It seems that I should load acpi-cpufreq for my system. When I run sudo modprob acpi-cpufreq it executes without error. The problem is that I cannot see ...
0
votes
0answers
90 views

Making CPU online doesn't work (armv71)?

I am trying to turn CPU status to online, but it doesn't seem to work. I run this: echo 1 | sudo tee /sys/devices/system/cpu/cpu0/online Here is what I get when I run lscpu: Architecture: ...
2
votes
1answer
600 views

trouble finding/installing cpu driver for AMD FX 8350

I'm very much new to Linux, but I've hunted for days and can not find any solution to my problem. I'm trying to use cpufreq to control the throttle on my cpu (AMD FX-8350, 64-bit), but I apparently do ...
5
votes
1answer
82 views

Why are the CPU frequency timing statistics all zeros?

The cpufreq timing statistics are all zeros: $ sort --unique /sys/devices/system/cpu/cpu*/cpufreq/stats/time_in_state | column 1600000 0 2100000 0 2600000 0 3100000 0 1700000 0 ...
0
votes
0answers
97 views

Why doesn't my PolicyKit localauthority file allow me to use cpufreq-set?

I'm trying to configure Xubuntu 13.10 (saucy) in such a way that I can change the CPU governor and maximum frequency (using cpufreq-set) without sudo. I created an ...
2
votes
1answer
2k views

How to permanently set CPU power management to the powersave governor?

I'm currently using this: cpupower frequency-set --governor powersave but it resets after each reboot.
0
votes
0answers
65 views

indicator-cpufreq only runs as root, is this normal?

I installed indicator-cpufreq from the Ubuntu repository onto my system running 12.04. I can only get it to run if I launch it as sudo. Is this the way it is supposed to work?
0
votes
1answer
76 views

safe to use Cpufreq

I have a hp pavilion dv5220us with a dual core T2050 (1.6Ghz , 2M L2 Cache , 533mhz Fsb.). I was womdering if it is safe to use CPU freq. the applet for Ubuntu 12.04.
1
vote
1answer
253 views

Can't scale frequencies, always jumps to lowest

The title pretty much explains it. I know this is not a hardware issue. CPU is an Intel Core Duo Output of cpufreq-info: cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors ...
0
votes
0answers
104 views

What are the Ubuntu-specific wherewithals against heat?

Note : this is not another question about my laptop overheats under Ubuntu x.y, but more of a reflexion about what makes Ubuntu (in this case, 12.04) handle heat better than other distributions on my ...
0
votes
1answer
740 views

undo: sudo update-rc.d -f ondemand remove

As the question says, I issued sudo update-rc.d -f ondemand remove cause that's what an article on configuring TLP says... but after doing the "configurations" my graphics went back to crap. So I ...
1
vote
1answer
3k views

Display clock frequency per core using Conky [duplicate]

I am using Conky to display a lot of information of my system. I managed to display the load percentage per core. But I do not know how to display the clock frequency of each core. What I have now is: ...
3
votes
1answer
828 views

CPU frequency scaling issue - scaling_max_freq wrong

I have the an issue on my Elitebook Core 2 Duo T9600, the scaling stops to work after few seconds of high load and get stuck at 800Mhz. Temperature is around 50-60°C for both cores, bios_limit is ...
-1
votes
2answers
125 views

Machine stops running randomly

I recently installed Linux MINT 15 64bit as a guest in a UBUNTU 12.04 LTS host. Everything is working just fine, except that the complete machine turns off completely (the host, physical machine) and ...
3
votes
2answers
5k views

How to set cpufreq governor to performance?

I am on Ubuntu 13.04 64-bit. I have heard that setting the cpufreq governor to performance will, well, increase performance. Unfortunately, I am a bit of a newbie at this sort of thing, and I am not ...
12
votes
2answers
4k views

Maximum CPU frequency stuck at low value

I have observed a problem with Ubuntu 13.04. The problem was not there on 11.10 I used earlier. The maximum CPU frequency is stuck at 2GHzon my Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz (Dell Lattitude ...
0
votes
1answer
717 views

is intel turbo-boost option good for life-time?

here is intel-core-i-7 with 2.8 Ghz resp. 3.5 Ghz as turbo-boost option. with this question I refer to this link: Does Intel turbo boost work in Ubuntu? Is option of turbo-boost not harming the ...
9
votes
2answers
12k views

Ubuntu 13.04 CPU frequency scaling 'stuck' on lowest frequency

I've just installed Ubuntu 13.04 on my MacBook Air, after toying around for awhile the machine felt really slow, so I checked out the CPU frequency. cpufreq-info, it reports 800MHz on all 4 cores ...
0
votes
1answer
583 views

cpu frequency stays at the top even with ondemand or powersave governors

The fan goes lower but the /sys/devices...../cpuinfo_cur_freq and scaling_cur_freq list the highest frequency. core i5 can go down to 1.2Ghz according to cpuinfo but watching the time_in_state shows ...
1
vote
1answer
699 views

Minimum and maximum cpu frequency are equal

I just noticed my laptop stared working considerably slower. I am using an updated 13.04, though the issue did not start right after the upgrade. After tracking down the issue I noticed that both ...
1
vote
2answers
1k views

Where is the configuration for laptop-mode-tools max CPU frequency?

I use laptop-mode-tools for power management on my laptop and for the life of my I cannot find where to configure the CPU frequency limits. When I'm on battery it sets the maximum limit, regardless ...
4
votes
1answer
527 views

How do you prevent CPUs from being throttled when battery is taken out of Laptop (aka only on AC power)?

My laptop CPUs are throttled down to .8GHz instead of 2.5GHz whenever I am connected to AC only and not the battery. I tried using cpufreq-set and it allows me to set the speed when the battery is ...
2
votes
1answer
768 views

Ubuntu 12.10 core different frequencies

There is a little problem with my CPU, I found some tutorials, how to install Avant Windows Manager, I wanted to change my cpu frequency, I thought it works, but it works only for one core. My CPU is ...