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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.

Pabi
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Vishvendra Singh
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  • Maybe this helps you: http://askubuntu.com/a/501599/308343 -- and it's safe to forget about the tips of CG – Run CMD Jul 23 '14 at 15:36

2 Answers2

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I had a similar issue on my dell inpiron, and solved it though several steps. There are a few needed applications, and an edit to /etc/rc.local

Install indicator-cpufreq, cpufrequtils: Open a terminal window ctrl+alt+t and enter

sudo apt-get install indicator-cpufreq
sudo apt-get install cpufreq-utils

These will help monitor your cpu

The edit to rc.local tells Ubuntu to ignore some settings in your bios, and will need to be customized for the number of CPU's that you have.

sudo nano /etc/rc.local

Before the line which says "exit 0", enter the lines

echo 1 > /sys/module/processor/parameters/ignore_ppc

for x in /sys/devices/system/cpu/cpu[0-3]/cpufreq/;do 
  echo 2501000 > $x/scaling_max_freq
done

replace "2501000" with the maximum frequency of your CPU, in kHz (it should be 2401000) - the extra '1' in the frequency indicates turbo mode

You can determine the max frequency your system supports by

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

Reboot, and everything should be good.

Charles Green
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  • it's not working dude I tried it but no result. – Vishvendra Singh Jul 23 '14 at 14:44
  • Can you add to your question the output of cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies and cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq and cat /etc/rc.local – Charles Green Jul 23 '14 at 15:01
  • ok dude i don't have enough privilege to post image so I am posting a link to image https://www.dropbox.com/s/w4af80i46bli8b7/Screenshot%20from%202014-07-23%2020%3A34%3A42.png – Vishvendra Singh Jul 23 '14 at 15:09
  • K - it looks like Ubuntu is detecting max frequency as 1.5 Ghz. We've reached the limit of my ability to do anything - my system always listed higher available frequencies, but would not access them before. – Charles Green Jul 23 '14 at 15:12
  • I don't mean to be rude, Charles, but you sound like you're not familiar with the details of @Jarvish 's case. – Run CMD Jul 23 '14 at 15:40
  • @Jarvish There is a thread you might follow at http://askubuntu.com/questions/43764/how-do-i-get-turbo-boost-working – Charles Green Jul 23 '14 at 16:35
  • @ClassStacker You are correct that I am not familiar with the details of Jarvish's computer - this is one of 551 models of dv6 that HP produced, and I'm simply a volunteer on this site. – Charles Green Jul 23 '14 at 23:07
  • Hey Charles, this has nothing to do with the specific computer model; if you recommend looking at the output of anything in /proc/ or /sys/devices/system/cpu/ then you first need to read and understand https://www.kernel.org/doc/Documentation/cpu-freq/boost.txt -- you will find no boost info at all in those outputs. And also, the thread you suggest deals with an Intel CPU. The relevant thread for @Jarvish is http://askubuntu.com/a/501599/308343 as I pointed out in a comment above. – Run CMD Jul 24 '14 at 05:34
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I found out that turbo core is working to cpufreq just doesn't show that to see that it's working use these command 

sudo modprobe -v msr
sudo cpufreq-aperf

it's shows average cpu frequencies over period of time and don't forget using performance cpu governor.

Vishvendra Singh
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