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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Unreliable CPU thermal sensor; monitoring disabled Ubuntu 14.04

I installed Ubuntu 14.04 on my PC and it shows something like that when i boot: unreliable CPU thermal sensor; monitoring disabled Is there something wrong with my CPU or is it sensor fault ?
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42 views

Banshee CPU usage > 100%

Banshee CPU usage peaks and maintains >= 100% (according to htop) when I do simple, nontrivial things. Even deleting files via Banshee results in >= 100% CPU usage. I have tried several ...
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1answer
15 views

get cpu usage in command

I want get cpu usage. I used this command : top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}' But return 100%. I dont know what to do.
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1answer
117 views

CPU temperature monitor for 14.04LTS?

Is there a way to configure psensor so the temperatures read out in real time in the panel so it could be read at a glance? So far, in order to read the temperature I have to click on the applet ...
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7 views

Amilo V8210 cpu fan speed issue

I got a Fujitsu-Siemens Amilo Pro V8210 with Intel® Core™2 CPU T5500 @ 1.66GHz × 2 and have installed Ubuntu 13.10. CPU fan issue as many others. Checked the BIOS settings, nada. BIOS is updated. ...
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24 views

i7 temperature too high

I use Ubuntu 14.04 and a notebook with i7 cpu. The problem is that I've 50° on cpu in idle, while in Windows I've 40°. Can you tell me why I've this problem? I've also installed nvidia proper ...
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3answers
5k views

higher cpu usage in ubuntu 12.04 than windows 7

Hi I have a Intel Core i5 with 6GB of Ram using ubuntu 12.04 64bit. I noticed that whenever I run chrome which is the faster browser for me in linux) when I watch youtube, the CPU usage for Chrome ...
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7answers
69k views

Kworker, what is it and why is it hogging so much CPU?

I recently upgraded to the Kubuntu Natty Beta 1 and I've been having a lot of issues with the process kworker. At moments it uses almost half my CPU. Also, strangely enough it seems to affect my USB ...
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1answer
27 views

Battery consume

i know this is a frequently asked question. After trying win 8.1 and latest opensuse i feel ubuntu 13.10 to consume much power. Lenovo B590 notebook with 1TB 5200rpm hdd, 8 gigs of ram, i5 2.5GHz ...
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1answer
814 views

How do I boot Ubuntu in VirtualBox complaining that my CPU is incompatible?

After a long time spent with OS from boys from Redmont I would like to try something new. I decided to try some Linux editions, also Ubuntu Linux. I am completely new to this matter, this is also my ...
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20 views

command not found when trying to set governor

In response to my questioning here: How to really check current cpu Hz? Sylvain Pineau told me to do this command to change cpu governor: echo "powersave" ...
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1answer
30 views

How to really check current cpu Hz? [duplicate]

All programs I've tried seem to be listing Hz from cpu's specifications not actually checking what the current Hz really is. for example a processor is marketed with 4GHz.But this is the max (unless ...
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1answer
333 views

Why the CPU make noises? [closed]

I Installed the Ubuntu Operating System and it work. But, when i use it, the my CPU make strong noises. why it this happening ? what the problem?
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0answers
34 views

100% I/O usage due to jbd2

I have 14.04 Beta 2 64-bit and Intel i7 Processor with 2.2Ghz clock, 4 GB RAM and 500 GB Harddrive. After using Ubuntu for some time, everything goes so slow and I cannot even move my USB mouse ...
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1answer
3k views

High CPU usage while playing Flash on 11.10

Hi guys from what I see by Googling around it's a common problem but somehow all the threads I've seen end in "Oooo Flash is terrible" and the post dies there. I'm experiencing a very high CPU usage ...
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0answers
35 views

What is causing Ubuntu on MacBook Pro to have high CPU usage?

I installed Ubuntu 13.10 on a MacBook Pro 10,1. However, after installing, the kworker process consumes over 90% of CPU usage. I tried the following: (Suggested in this answer) Execute grep . -r ...
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0answers
14 views

CPU Problem with 13.10 VMware Player Appliance

I have mounted a 64-bit Ubuntu .iso onto a VMware Player virtual machine, but it came up with a messsage saying my host is unable to run 64-bit guest OS-es. I have checked this issue with the VMware ...
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6answers
19k views

Is it normal for compiz to consume 40% of my CPU with no other programs running?

When I have no other programs running, compiz takes up at least 40% of my CPU. Is this normal? If it is normal, is there anyway I could make this program take a smaller percentage?
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54 views

Ubuntu 12.04 freezing during parallel processing [closed]

I'm currently trying to implement a pretty cpu intensive task using Julia. I made a single threaded version which works fine. However, problems arose when I implemented a paralleled version, which ...
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0answers
9 views

Heavy CPU usage with LTspice on Ubuntu 12.04 32 bit

I currently have LTspice IV installed on my ubuntu 12.04 32 bit machine through wine. I have no major problems running the actual software, but the thing that worries me is how much CPU power the ...
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2answers
2k 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 ...
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0answers
49 views

High CPU usage for graphical (Streaming/Offline Video) usage

Whenever I stream video (HTML5 mostly, sometimes flash) my CPU usage shoots quite high, often reaching close to 90%, although very less RAM is being used. I installed libvdpau-va-gl to enable hardware ...
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0answers
18 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: ...
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0answers
35 views

How do sensors-indicator colors work?

I have been using lm-sensors for a while now, and decided to try sensors-indicator not to enter the command manually on Terminal each time I want to take a quick look at my laptop's temperature. My ...
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4answers
6k views

watchdog/0 process using all my CPU suddenly

I have a fresh installation of Ubuntu 12.04, I have been running it for about a week. Suddenly today I noticed my computer freezes every 5 seconds. I restarted the computer and I still get this. I ...
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2answers
226 views

Sluggish desktop/Unity performance on ThinkPad Edge

Fresh (1 week old) install of Ubuntu 12.10 64 bit version on a ThinkPad Edge 15, specs as follows: System specs (site wouldn't let me hotlink the image) I think the swap is about 2GB but can't ...
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33 views

Ubuntu 13.10 CPU1 usage over 75% and other core 20% [duplicate]

Ok i'm on Ubuntu 13.10 64bit and while doing nothing i can see from System monitor that CPU1 has a 75%+ of load meanwhile the other core stayat 20%...sometimes they go up but not for too long...What ...
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76 views

Is this CPU usage for TeamViewer on Ubuntu normal? If so, are there any better options?

This image was taken while logged in remotely via TeamViewer to my workstation. There are four TeamViewer_Desktop processes open (why?), two of them taking a large amount of CPU (why?). I tried ...
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5answers
26k views

Any way to check the clock speed of my processor?

Is there any way to check at which clock speed my processor is running? I have already tried cat /proc/cpuinfo but the clock speed I'm running isn't showing. I know Ubuntu 12.04 (Precise Pangolin) ...
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1answer
96 views

high CPU usage on Ubuntu 12.04

I just installed Ubuntu 12.04 on my Asus k53s notebook. Processor is Intel® Core™ i5-2410M CPU @ 2.30GHz × 4 5.7 GiB RAM. The CPU usage gets very high after a while, specially when using internet. ...
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3answers
4k views

How to step up my CPU's frequency?

I installed xubuntu 12.10 in a Fujitsu Siemens laptop with Intel Pentium M processor 1.86Ghz. I noticed that the processor's frequency that the "System information" mentions is only 800Mhz (step down ...
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25 views

How to find out which service uses a certain CPU core?

How can I find out which process/application uses Core number 4? As I saw in Htop there isn't any application which uses high CPU, but still my fan is running "wild" and also the CPU graphic in Htop ...
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1answer
48 views

apt-build on ubuntu, if I change processor will give problem?

I installed apt-build on Ubuntu, it is a program that compiles and installs programs. It compiles optimally for the user processor and this makes programs run quickly. But I thought what if I change ...
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1answer
26 views

Changing cpu from intel to amd

I currently have two computers using ubuntu, I want to switch the hard drives of the two so the one I use more has more space. My problem is one of my computers has a intel cpu and one has a amd CPU, ...
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1answer
105 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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2answers
2k 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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107 views

lm-sensors not showing CPU temperature?

I have a machine running on top of AMD Opteron 6380 (16-core) x2 CPUs. OS details are as follows: Version: Ubuntu 12.04.3 LTS (precise) uname -a: Linux sysname 3.5.0-23-generic #35~precise1-Ubuntu ...
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34 views

How to enable cpuset on Ubuntu 12.04?

I have set up CPU sets with cset in Ubuntu 12.04, but they are not respected. Processes just use all the CPU they can, no matter what set they are assigned to. It seems that cpuset is not enabled. ...
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1answer
77 views

Lubuntu Task Manager always shows CPU usage at 100% even at idle

Is there a way to find out what application is causing the high CPU? Top shows nothing eating up the CPU. Even at idle my CPU is at 100%. Never changes. Never goes down. Always at 100% no matter what. ...
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0answers
22 views

MacBook Mid 2008 use both CPU cores/Deactivate nolapic

I'm quite new to this community so bare with me if I happen to do anything wrong. I've got a problem with my MacBook 5,2 (mid 2008) running Ubuntu 13.10. It detects only one core, though the System ...
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0answers
77 views

ubuntu 12.04 Init process provokes memory leak and CPU intensive usage

I have lately been having some memory and CPU issues with init process. After rebooting, the memory used by it keeps increasing at quite high pace, and after half hour it occupies all the memory RAM ...
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2answers
1k views

Which operating system takes more advantage of multi core cpus [closed]

I want to know which one will benefit more from amd 8 (or in multi core setup in general) core setup windows or Ubuntu or there will be no difference ?? thank you in advanced
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0answers
77 views

How to change CPU fan speed? (Works in Windows)

I've got an MSi G45 board and a 3570K with a CM 212 EVO cooling it. In the BIOS, I change the ambient fan speed for my CPU cooler to 12.5% - so when I boot up and it through POST, etc., the fan spins ...
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0answers
28 views

Xorg High CPU When Redrawing

For about the past week or so, xorg has been going crazy whenever the screen updates, for example scrolling a webpage, or just moving a window around. I can hear the fan turn up, and there is a huge ...
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197 views

High CPU usage in any browser

For about the last week, browsing the web from Chrome beta, Chrome stable, or firefox causes unusually high cpu usage. It Idles OK, but spikes a fair amount, but loading any page, with or without ...
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2answers
273 views

Ubuntu 12.10 gnome system monitor high cpu usage

I am totally new to Ubuntu. I tried to install numerous times, but always removed it because of loud fan noise. Me and my Bro have the same Notebook, a HP Compaq 615, and what grabbed my attention ...
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43 views

Installed FX-6300 (6 core) from Semphron (1 core) and now interrupt request storm (ksoftirqd)?

Scrypt mining in cgminer used to have no issues with Semphron 145, I switched to FX-6300 and processor usage shot up to 100% and stuck there. cgminer process is consuming about 20% and six ksoftirq ...
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0answers
18 views

Is it there a software like Speedfan for Ubuntu? [duplicate]

I need to lower the CPU fan's RPM. Thanks in advance.
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1answer
72 views

How can I see my System details in a Graphical way? (in Lubuntu)

I am new to LUbuntu. In Windows, if I want to know my system properties, I see it by going to Control Panel and clicking on the System icon. What are the equivalents of these features in LUbuntu, ...
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83 views

ubuntu 12.04 - fuser high cpu

The problem is fuser high cpu and server load high. root 20 0 7580 840 692 D 10 0.0 0:00.31 fuser 16061 root 20 0 7580 844 692 D 10 0.0 0:00.31 fuser 16062 root ...