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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72 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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69 views

One of my two cores suddenly flatlines at zero percent

I've been using Ubuntu for about three months, and twice now the first core of my dual-core laptop suddenly flatlined at zero percent for no apparent reason, while the second one seemed unaffected. ...
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3k views

Fan always on and overheating problems on HP G62

I have a HP G62 with i5 processor, 4G Ram and ATI HD 5470. Started using Ubuntu 4 months ago, first was 11.10 and after 12.04. Everything worked perfectly until some weeks ago when my cpu fan became ...
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12 views

Team Fortress 2 using too much CPU on Ubuntu 14.04 LTS

CPU: AMD A6-4400M APU x2 (not sure if it is two physical CPUs or cores don't know a lot about that) with Radeon HD Graphics (Radeon HD 7520G) RAM: Ubuntu says it is 7.2 GB but I installed 8 GB (I use ...
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0answers
22 views

16 cores are not being utilized out of 80 cores

Recently I discovered that our server does not utilize all 80 threads anymore in the system. It looks like if 16 cores are always idle, despite the high system load. Its a Dell powerEdge R900 server, ...
2
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746 views

Ubuntu CPU load

I'm new to Linux world and I have a problem with my fresh installation of Ubuntu 14.10 64-bit. My processor is Intel® Pentium(R) D CPU 2.80GHz × 2 with 4 GB of ram and GeForce 8600 GT/PCIe/SSE2. When ...
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0answers
187 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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37 views

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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309 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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284 views

ubuntu 12.10 64-bit consuming 100% cpu power and high battery

I am new linux user, installed ubuntu 12.10 (64-bit) from wubi (getting boot option (windows7/ubuntu). But after opening ubuntu, laptop gets heat up, fan running very fast and performance is very ...
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146 views

CPU fan kicks in to full gear when i try to install ubuntu 12.10 or LTS

Whenever I try to install (DUAL BOOT WITH WINDOWS 7) both versions of Ubuntu desktop on my PC the CPU fan starts spinning so fast that I couldn't even go through the installation for fear of my CPU ...
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497 views

Screenlets RingSensors has to many CPU sensors, what are they?

I just installed screenlets to get some onscreen information about my system. I'm trying the RingSensors screenlet to monitor cpu load, but there are more sensors available to monitor than I'd expect. ...
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620 views

Why is only one CPU detected on a Macbook with a dual-core processor?

I have a January, 2009 Macbook5,2. It has an Intel Core 2 Duo 2Ghz processor. Since installing Xubuntu 12.04, it runs very slowly. The CPU gadget in the top panel shows only 1 dark column to the left ...
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32 views

CPU high usage with no reason

I am experiencing high CPU usage and overheating with Ubuntu 14.04 on a Dell Inspiron-N5110 laptop, seemingly for no reason. CPU: Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz Cadencé à 2.30 GHz RAM: 4 ...
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18 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) ... ...
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42 views

Why my PC turned off unexpectedly?

Let me tell the complete story. I have a normal PC with monitor, CPU, UPS, mouse and a keyboard. I use Ubuntu 12.04 LTS. For the last 15 days my computer is shutting down unexpectedly. Here in my case ...
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16 views

CPU usage varies from 0 to 100. Strange waveform

so I have a strange problem. I'm currently using an old Thinkpad T61 and Ubuntu 14.04 LTS, although this same problem was also happening when I had elementary OS Luna (based on ubuntu 12.04 LTS) ...
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147 views

What causes high CPU usage by mount.ntfs?

I'm in Ubuntu 14.04 64-bit. mount.ntfs use high CPU--40%. I have Intel Core i5-3210M. Why is this happening? lsblk: NAME FSTYPE SIZE MOUNTPOINT LABEL sda 465.8G ...
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237 views

xubuntu: compiz using 100%+ cpu

I seem to be experiencing an issue with Compiz in terms of cpu usage. The only thing I've been doing differently (been running this system for a month or two with no issues) is I have been running ...
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0answers
194 views

Ubuntu 14.04 lost cores on AMD CPU

It seems that I have a problem. Installed 14.04 a few days ago, everything was smooth sailing until yesterday it wouldn't boot up. Recovery mode says that CPU's 1-6 don't respond. After 7 it moves ...
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97 views

CPU fan not working in acer gateway ne56r

My laptop fan was not running in ubuntu 14.04 and hence it become heated up easily. Kindly help to get a solution for to get my laptop fan running. In windows i never had these kind of issues
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224 views

NodeJS Hangs on Ubuntu 14.04 Boot [Big CPU & Memory usage]

Node somehow hangs on Ubuntu 14.04 boot. It uses lots of CPU and RAM (Checked with Terminal -> top). I need to have root permissions to kill it and it doesn't work after the first time. Had to spam ...
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55 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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144 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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100 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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134 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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64 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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38 views

Processor Tunable status according to Powertop

I am absolutely new to the LINUX platform, since I just migrated to Ubuntu 13.10 from Windows8. I installed powertop so that I could assess my processor. The Tunables window of the output returned by ...
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78 views

Laptop with Battery is faster than Power Connection at Ubuntu 13.04

Recently, I found a very strange phenomenon on my laptop. When the laptop is plug-in the power, then the CPUs work slowly, but when it is unplugged, i.e. it works with battery, then the CPUs work with ...
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73 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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128 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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275 views

Corsair Hydro i series cpu cooler fan control

I have been toying with the idea of a Corsair h80i for my dual boot system (win7/U12.10) and mostly use it in ubuntu. I have done some research on the interweb regarding fan control in linux and ...
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183 views

TOSHIBA Satellite U400 kernel 3.10 3.11 3.12 cpu fan

After switching to any kernel above 3.9.11 my cpu cooler acts like cpu was overheating, it spins all the time trying to cool down processor even if it's below 50 Celcius. I don't think it's the distro ...
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0answers
127 views

Overclocked CPU speed not detected in Ubuntu 13.04

I have a stable overclock that I have been running since Ubuntu 12.04. However, after upgrading to 13.04, the available frequencies only includes up to my stock speed as per: cat ...
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192 views

12.04 gvfs-afc-volume CPU usage high, no iphone

I've notice many people reporting this problem and I'm suffering from it too on Ubuntu 12.04. I'm using GVFS for android support, but I rarely connect to any GVFS devices yet this problem appears all ...
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0answers
258 views

High CPU temperature when using GNOME

I have ASUS Extensa 4220 laptop.If I install Kubuntu (any KDE-based), then the CPU temperature looks normal for a long time (now it is 74 degree Celsius). But when I install GNOME-based distros, then ...
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0answers
68 views

How to investigate scheduler issues?

I have a server process that should runs multiple threads at close to 100%, each on its own CPU. When I run the process on a RHEL box, the CPUs in question appear to stay pegged at 100%, according to ...
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0answers
234 views

Ubunut 12.10 64 bit using 100% CPU

Configuration Ubuntu 12.10(64 bit) i3 Processor Ruby 1.9.3 Java openjdk(6 or 7) Any ruby or java command using 100% CPU. It works perfectly fine with ubuntu 10 or 11 (32 bit).
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652 views

Xorg and compiz using 20% of CPU

I'm not doing anything in particular but Xorg is currently using 8-15% of my CPU and Compiz is using 5-15% as well. I have 4 virtual desktops (aka workspaces) and like 10 windows open but I see no ...
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0answers
270 views

Increased CPU temp compared to Windows 7

I have a Lenovo Z570 Thinkpad with windows 7. One of my friends suggested that a 4GB RAM is much more effective when working on Linux than on Windows, so I searched a lot and installed Ubuntu ...
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0answers
209 views

high interrupts

I have high Rescheduling interrupts and Local interrupts. while doing nothing my total CPU wakeups reach 275-400. While watching movies it reaches up 900-1000. And while browsing the Internet it ...
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0answers
241 views

Reading cpu temperature Intel Celeron (R) with lm-sensors

I know there are already a lot of questions like this, but non of the answers provided there could fix my problem. I try to read out my cpu temperature with lm-sensors on my ubuntu 10.04 LTS ...
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0answers
4 views

Hangup during boot “Starting CPU interrupts balancing daemon”. Ubuntu Server 14.04

halp me plz. I don't know how this would affect anything, but the last change I made to my server was deleting and replacing the ssl keys in /etc/nginx/ssl I am using an AMD Phenom II X4 960T. ...
0
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0answers
10 views

ASUS X101h high temperatur

I have ASUS X101h netbook and installed all debian/ubuntu/arc/redhat/fedora etc.. distros. In all situations, virtual device temperature and CPU temperature is too high.(When I open firefox and open ...
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28 views

Java & High CPU usage

I use a certain java application to trade the stock market and it consumes 90% my CPU power. And the CPU temp usually remains around 90c. This is a real headache. What causes this problem and what are ...
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0answers
36 views

CPUs usage 100%

System is an Atom(MSI Wind Notebook) that was upgraded to 14LTS from 12LTS. Both CPUs are running @ 100%. System Monitor doesn't show anthing but 6-0 % usages. Some spikes of the xringd, compiz, munin ...
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94 views

Cpu temp at 70°C, fans at minium

I'm running Ubuntu Server 14.04, and the cpu temp is at 72 degrees, but the fans are still at minium. I Can just hear them. Normally they are noisier than planes. My cpu overheats if the fans don't ...
0
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0answers
72 views

indicator-multiload (System Load Indicator) don't show cpu usage correctly

I have accidentally deleted CPU usage percentage from indicator-multiload menu and now I can't remember what it syntax looks like and can't go back to how it was. Possibility 1 (simplest one). Can ...
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0answers
87 views

Ubuntu Gnome 14.04 - 100% CPU usage alternating between cores

I've noticed my Ubuntu Gnome 14.04 has been getting a bit sluggish lately - things like Gnome Shell overview animation are jerky where they were lightning fast, Elder Scrolls Online is stuttering and ...
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0answers
65 views

Intel graphics driver installer, now the CPU fan is rarely quiet

I have an Optimus chipset: Intel HD 4000 (i7-3635QM CPU) Geforce 640m I don't care about the NVIDIA card, so I didn't try to install any proprietary drivers for it. So: I was having a ...