CPU stands for Central Processing Unit, and is the main processing chip used in every computer. Brands include Intel, AMD and ARM. CPUs are commonly available in 32- and 64-bit, and come in a variety of frequencies or with multiple cores.

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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.
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ubuntu black screen appears

I am using ubuntu 12.4 in that we have installed 2Gb RAM dual core processor I have installed some of the software like eclipse , SQL . while using these software's few seconds screen goes into black ...
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323 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 ...
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1answer
419 views

How do I use all available hardware resource in my Intel® Core™ i7-3517U?

My sony vaio has a processor model: Intel® Core™ i7-3517U It appears to me as being 4 cores but it does not show the threads. What is wrong? How could I fix it? How can I access that information? I ...
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1answer
408 views

How many physical processors does ubuntu support? [duplicate]

How many physical processors does ubuntu support? I have a 4 socket server mainboard with 4 dual core AMD Opterons. Will Ubuntu support all 8 processors. I also have plans to upgrade to 6 core ...
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718 views

Set A Lower P-State For My CPU (Underclocking)

In Windows 8 you can set a max/min cpu speed percentage allowing you to use your cpu at a lower or higher P-State. For example, my cpu has a default speed of 2.3ghz (turbo 3.2ghz), however using the ...
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81 views

Why my CPU of 2.1GHz clocks at 800mhz in Ubuntu 13.10?

I've a problem with my notebook DELL INSPIRON 1720. This notebook have a CPU Intel t8100 2.1GHz and it doesn't work perfectly. It works at 800MHz stable, like in power-safe. But when I change the ...
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2answers
572 views

Stop cpu from overheating

When running intensive apps like blender my CPU can get up to 80.C I can manually underclock the CPU from the BIOS but I would like to have my pc detect when the CPU temp gets too high and slow things ...
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1answer
446 views

cpu load not distributed over cores

Under heavy task it seems the cpu load is not spread accross all available cores and fan is triggered wile I am waiting for the opération to perform... Looking at the CPU monitor one CPU is 100% when ...
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176 views

How to find CPU shutdown temperature? (Think it's called TJMax, maybe not though…)

In Windows there is a program called CPU Temp which shows various CPU temperatures, one which being the temperature at which point the computer will shut down to prevent damage to the CPU. I have a ...
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2answers
297 views

How do I Manually Limit CPU Usage? [duplicate]

I have an old laptop prone to overheating and a good solution I found was limiting it's CPU usage to below 50%. On Windows, I can do this by changing the power plan I am currently using, and altering ...
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1answer
72 views

cpu power mode occasionally changing to performance

The CPU power mode is occasionally changing to performance which causes my laptop to overheat and shutdown :( Is there any way to prevent that?
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2answers
5k views

“Kernel requires x86-64 CPU, but only detects i686” in an Intel Intel Core i7-2600k?

I have a VM installed in my windows 7 PC, and I want to install an Ubuntu 13.04 on it, as a new virtual disk. I have this machine: Intel Core i7-2600k CPU @ 3.40Ghz - 8 GB RAM - 64 bit operating ...
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1answer
442 views

CPU frequency scaling on Ubuntu and Windows

Linux reports my CPU's maximum frequency as 2.40 GHz and min as 1.2 GHz. Windows 8's Task Manager shows the CPU frequency going above 3.0 GHz or below 1.0 GHz on occasion, according to usage. This is ...
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1answer
385 views

Incorrect CPU clock speed?

I have recently purchased a new laptop, and installed Ubuntu. It uses an AMD A8-4500M processor, which, according to the link below, should have a clock speed of 1900-2800 mhz. ...
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1answer
4k views

How to configure cgminer to mine with the CPU?

I installed the cgminer to try to get into a bitcoin mining pool, but I have no GPU. I know that mining with the CPU is not very eficient, but I want to know how to configure cgminer to mine with the ...
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1answer
117 views

Can't Boot An Intel Equipped Laptop From the Burned ISO For 13.10 ISP (X386)

Keep getting an error message that "This kernel requires the following features not present on this CPU: pae". I'm running an Intel Pentium M 2.0 GHz, with 2 GB of RAM on a 60 GB hard drive. This is ...
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35 views

Which ubuntu 12.04.3 is best for Device lc2430i ? [duplicate]

Which Ubuntu version should I download for new Linux-certified laptop ? Device Name: lc2430i MEMORY: 3.8GiB Processor:3rd Generation Intel Core i5-3210M CPU @ 2.5GHZ X 4 (3MB L3Cache,2C+HT) OS TYPE: ...
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1answer
250 views

Ubuntu 12.04 doesn't recgonize m CPU correctly

My computer is running ubuntu 12.04 (64bit), and I have a AMD Athlon(tm) X4 760K Quad Core Processor which is about 3.8ghz (and an Radeon HD 7770 GPU). Yet, when I type in cat /proc/cpuinfo - I get: ...
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1answer
4k 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: ...
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1answer
38 views

Weird System performance

I just freshly installed Ubuntu 13.04. My CPU seems to be going from 70 to 30 every 5 seconds or so. Same for the wireless. Weird stuff going on
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2answers
686 views

What temperature is considered bad for my processor? [closed]

I am using the unity Temperature sensor and I have an Intel® Core™2 CPU 4400. If you need more info I would be happy to include more details about my PC that could help. Thanks
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1answer
190 views

High CPU Usage Causes Server Power Off

My first post here, so apologies if anything is missing. I currently have an Ubuntu hosted VPS, which periodically runs a PHP script which does a lot of regex processing and interaction with a local ...
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2answers
2k views

What is vPro, is it Linux compatible?

I saw that some of the Lenovo laptops have "vPro" processors, which enable special management features: ...
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1answer
144 views

How to restore the cpu frequency defaults or to align the frequency at will?

I really new at ubuntu and linux so i am not capable of understand the following: usage: update-rc.d [-n] [-f] <basename> remove update-rc.d [-n] <basename> defaults [NN | ...
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3answers
2k views

Sony Vaio VPC-EC Series, CPU Temperature very high.

I know this has been asked quite a few times before, but after some intense research I still could not fix my CPU problems. I'm running Ubuntu on a Sony Vaio from the VPC-EC series. Under windows 7 ...
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1answer
175 views

Wich version of ubuntu should i use with my processor [duplicate]

I bought a laptop a while ago and i'm sort of trough with windows. I wanted to try ubuntu but I don't know wich version I should take. I got a Samsung NP300E5A-S02NL It has a Intel I3 ...
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2answers
346 views

Why does CPU usage spike just when Transmission is finishing a download?

I noticed this when I was watching a video and it started lagging just before until shortly after a download finished. The second time I monitored it using top and the cpu rises above 100%. My ...
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2answers
68 views

Is there any way to retain word 2010 format?

I have some resumes and other documents that are really format dependent. They were originally created with Microsoft Word 2010, and is there any way to put them into ubuntu and have them still be ...
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1answer
226 views

How to resolve excessive CPU usage?

I just installed Ubuntu 13.04 on my brand new notebook and PU usage is insane. I'm a new Linux user. Can somebody help me? Specs and system monitor:
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1answer
160 views

Which file is called or event is fired when we plug-in / plug-out power supply to the laptop?

Everytime I plug-in or plug-out powersupply the CPU frequency is changed to 'powersave' which results in reduced efficiency. I need to be on 'performance' all the time. I've made a small java utility ...
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1answer
193 views

How to log and export CPU Usage over time?

I am currently doing a project at school about sound proofing a PC Case and need a way to log the CPU load, so that I can graph it against sound and temperature of the case. I am very new to using ...
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2answers
10k views

High CPU usage even when no application is running(Desktop)

I always have high CPU usage in Ubuntu in every version of it that I have used. I have been using Ubuntu from 10.04 version. My CPU usage even at idle is more than 30% for each core(unlike Windows 7 ...
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1answer
4k views

How to use cgroup in ubuntu 13.04

I'm trying to learn how cgroup works on Ubuntu and seems that cgroup doesn't work in Ubuntu 13.04. I am using the answer to this question How to set cpu limit for given process permanently. Cpulimit ...
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1answer
27 views

13.04 Installs the wrong ISO [duplicate]

When I download the 64 bit 13.04, no other options are given and the download just begins. I am using a MAC and this default is the wrong processor.
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0answers
407 views

In Ubuntu 12.04, odd whining/humming coming from left side of MBP (2,2)

I have been searching for a similar issue to mine, but unfortunately haven't found anything. Anyhow, this week I installed 12.04 on my 2006 MBP (2,2). Pretty much everything seems to work OK, but ...
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1answer
4k views

is it true that Chromium uses more cpu than firefox?

Hi I was a firefox user but I switched to Chromium a while ago and I feel like Chrome uses uses more cpu browsing the web than firefox... I have this psensor app installed on my ubuntu 12.10 which I ...
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2answers
2k views

Processor temperature when just browsing the web is 55-60 C

I'm running ubuntu 12.04 on my laptop. It has an Intel® Core™ i7-3537U CPU @ 2.00GHz × 4, 8 GB ram, and an AMD Radeon HD 8730M It also has a Intel HD 4000 but i'm using AMD I have nothing else open ...
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1answer
1k views

mount.ntfs taking up 99% of cpu [closed]

I dual-boot Ubuntu and Windows with WUBI, version 12.04, and have been recently running into some issues. Every once in a while, I run top and see that mount.ntfs is taking up all of my cpu. It is ...
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2answers
3k views

Permanently change maximum CPU frequency

So far I've found temporary solution for my problem at Maximum CPU frequency stuck at low value, but the question that I have is how to make it permanent. Right after reboot, frequencies are set back ...
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3answers
2k views

Hyperthreading on 32-bit but not on 64-bit?

I have a strange situation. I have two computers with identical hardware, both Core i5, exactly the same model. The only difference is the OS, one has 12.04 32-bit and the other one has 12.04 64-bit. ...
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1answer
3k views

Xorg/Compiz is using massive amounts of CPU. What to do?

I am using Ubuntu 12.04. I've been trying to figure out what is causing my Xorg and Compiz to frequently come close to maxing out my CPU usage for weeks now. Essentially, during normal use, both ...
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1answer
492 views

lowering CPU load average, Kubuntu 12.04

I've got a question about lowering CPU loads, if I understand correctly when I issue the 'uptime' command I get 3 values representing 5, 10 and 15 minutes of average CPU load. My current stats are ...
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1answer
3k views

which is the best ubuntu for intel atom processor [duplicate]

Which is the best Ubuntu for Intel Atom powered notebooks? I have already tried 13.04 but that did not work. please help.
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1answer
30 views

Running Ubuntu on PC- A Couple of Questions?

I am currently thinking about buying a new laptop, and I want to buy a PC for its good price to hardware ratio and run Ubuntu on it because I do a lot of app and web development work. My questions ...
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141 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 ...
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405 views

Logical / Physical processors supported [duplicate]

Can anyone tell me the maximum number of logical as well as the maximum number of physical processors supported in the latest release of Ubuntu? In the documentation online, I've found the 8 ...
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4answers
894 views

CPU overheating (Acer 4730z + Ubuntu 12.10)

After using the pre-installed Windows Vista on my Acer Aspire 4730z for over 4 years, I decided to switch to Ubuntu. I installed a brand new SSD with Ubuntu 12.04, which I later upgraded to 12.10. ...
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1answer
357 views

high CPU load all the time

Simply, My PC is Crap, it has Pentium 4 3GHz 2MB Cache CPU with Intel graphics G31/G33 and 1GB RAM on normal work, such as using firefox, the CPU use is more than 50%, and if i opened more than 5 ...
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1answer
62 views

Is there a way to get some notification if my ubuntu 12.04 uses 90% of CPU

Now a days, My computer is getting stuck as I m running lot of programs.What I need is a some kind of notification when processes become 90% or so.