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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 an Intel i5, with 2 cores and 4 threads.

So I used these commands to find out whats going on

watch -n 1 cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq

CPU*= CPU0 Frequency = Full, CPU1 Frequency = 1,2Ghz, all other CPUs are 1,2GHZ too.

Any idea how to "repair" it?

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up vote 4 down vote accepted

There's a program called granola which is theoretically used for energy saving. Instead of that, I use it for using the full speed of my CPU. To install it, if you're NOT using Quantal, just follow the instructions on the download page. Note it's freeware, to download it for free enter just $0 on the Custom Ammount textbox before downloading.

If you use Quantal, you'll have to download the debs from here if you use 32-bit, and from here if you use 64-bit. Download only granola_5.0.15-0quantal1_amd64.deb (or replace amd64 with i386 if you're using 32-bit) and granola-gui_5.0.15-0quantal1_amd64.deb (also replace amd64 with i386 if you're using 32-bit). Download them on a new subfolder, e.g. ~/Downloads/granola. Then install them entering a terminal and running the following commands:

$ cd path/to/folder
$ sudo dpkg -i *.deb

(replace path/to/folder with the relative or absolute path to the folder where you downloaded the debs)

That's all what you have to do. As they have a Quantal repo, I assume they'll be adding it on their automatic installer soon, but when I tried it two days ago, it didn't still work.

After installing Granola, search Granola on the dash and open it. Go to menu - Edit - Preferences and select Highest power. Then just open the startup applications configurator, and add a new entry with the name Granola and the command granola. Just save, and Granola will run each time you boot. You can do lscpu the check it. Look at mine before:

unrar@catbuntupc:~/bots/git$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Hilo(s) por núcleo:   1
Núcleo(s) por zócalo:2
Socket(s):             1
Nodo(s) NUMA:          1
ID del vendedor:       GenuineIntel
Familia de CPU:        6
Modelo:                15
Stepping:              13
CPU MHz:               800.000
BogoMIPS:              3989.98
caché L1d:            32K
caché L1i:            32K
caché L2:             2048K
NUMA node0 CPU(s):     0,1

And after:

unrar@catbuntupc:~/bots/git$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Hilo(s) por núcleo:   1
Núcleo(s) por zócalo:2
Socket(s):             1
Nodo(s) NUMA:          1
ID del vendedor:       GenuineIntel
Familia de CPU:        6
Modelo:                15
Stepping:              13
CPU MHz:               2000.000
BogoMIPS:              3989.98
caché L1d:            32K
caché L1i:            32K
caché L2:             2048K
NUMA node0 CPU(s):     0,1
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works like a charm. +1 for solid install instructions –  don.joey Dec 24 '12 at 9:37
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