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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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
3k 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
365 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
1k 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
2k 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
1k 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
2k 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
431 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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0answers
134 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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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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2answers
135 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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0answers
224 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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1answer
306 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
776 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
329 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
61 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.
5
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2answers
715 views

fancontrol on no pw-capable machines

I've installed Ubuntu 13.4 on my Alienware m14x and noticed one thing, cpu gets as high as 70 degrees centigrade (with nothing resourceful running) and cooler doesn't respond to that, just stays calm ...
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2answers
626 views

Ubuntu running slow and laggy [duplicate]

My Ubuntu has been running pretty slow, but I don't know why. I have the latest updates and all. I installed Ubuntu i368 on a AMD processor does that effect the speed? Thank you.
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1answer
322 views

How to automatically slow CPU instead of starting fans?

In Windows' power options, you had the ability to configure your system to use either 'active' or 'passive' cooling schemes. In the 'active' scheme, the fans would start running faster as the CPU got ...
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1answer
702 views

AMD FX CPU drivers/patch

I am using Ubuntu since 2009 on notebooks with Intel CPUs. However now, that I am using AMD's FX 6300, I am interested in knowing if there exists anything from Ubuntu (specifically any kernel ...
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1answer
170 views

htop showing duplicate applications with very odd bizarre results upwards of 20,30,40 or more, see screen grab

I have attached screen shots of htop and it's bizarre results. Can anyone explain what is happening here? It shows this new copy.com app taking up like 500% of my memory if you count it up.
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1answer
534 views

Acer TimelineX 4820TG fan speed out of controll after install Ubuntu 12.04

Laptop Acer Aspire TimelineX 4820TG. Dual boot Windows 7 and Ubuntu 10.10 Despite some small bugs the machine runs fantastic with this software. After installing Ubuntu 12.04 the cooling fan runs ...
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4answers
5k views

Dropbox very high CPU usage without any actual data transfer

The Dropbox process constantly clocks more than 50% CPU usage sometimes going up to the higher 80s and 90s. At the same time it does not even upload/download the files it is supposed to. The progress ...
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1answer
72 views

What is hammering the CPU when top is not running?

On Kubuntu 12.10 I can see with the KDE System Monitor Plasmoid that the CPU usage is fluctuating between 60% - 90% on both cores. As soon as I open top it goes down to 3% - 10%. I thought that the ...
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1answer
3k views

How to troubleshoot high cpu problems related to postgres and postmaster service?

I'm using an open source(RHCE 6.2) based machine running SIEM software , when i do the top command i see postgress postmaster both eating 96% of cpu usage? Is there a way to pin-point or see ...
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2answers
5k views

Why is the Intel Turbo Boost Mode not running at maximum speed?

I tested CPU frequencies with either the Intel tool i7z and turbostat from the linux-tools package (sudo modprobe msr, sudo turbostat) and what I find as maximum frequencies for two different ...
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1answer
72 views

high cpu linked to unresponsive websites?

I have two websites on an ubuntu server. None of them are responding when I try to access them on a browser. So I sshed into my ubuntu server and ran the top command. I noticed that three processes ...
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2answers
4k views

Maximum CPU frequency stuck at low value

I have observed a problem with Ubuntu 13.04. The problem was not there on 11.10 I used earlier. The maximum CPU frequency is stuck at 2GHzon my Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz (Dell Lattitude ...
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3answers
118 views

CPU Upgrade Issue

Is it possible to upgrade CPU (ex: from AMD Athlon II X2 to Phenom II X4) without any problems? I means just replacing the old cpu with new cpu at same socket and booting ubuntu with any problems or ...
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1answer
750 views

is intel turbo-boost option good for life-time?

here is intel-core-i-7 with 2.8 Ghz resp. 3.5 Ghz as turbo-boost option. with this question I refer to this link: Does Intel turbo boost work in Ubuntu? Is option of turbo-boost not harming the ...
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0answers
278 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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2answers
257 views

Taking The Cores Offline

I have Intel® Core™ i7-2670QM CPU @ 2.20GHz × 8 process which has 4 physical cores and 4 logical cores. Most of the time i been on AskUbuntu, Watching videos, Basically no processor hungry ...
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1answer
242 views

Ubuntu Compatibility

I'm in the process of building a computer for a customer who has requested Ubuntu 13.04 to be installed could someone tell me if the following components are compatible. CPU: Pentium G2020 ...
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1answer
2k views

Should I install amd64-microcode? [closed]

This is my system: AMD Phenom II x4 960T (unlocked to 6 cores) 8GB 1066 DDR2 RAM Gigabyte Radeon HD6670 1GB DDR3 (AMD Catalyst 13.4 propriety driver) Ubuntu 13.04 at 1920x1080 60Hz Dual boot with ...
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1answer
137 views

Ubuntu 13.04 only detects one of my processors

processor : 0 vendor_id : AuthenticAMD cpu family : 18 model : 1 model name : AMD A6-3670 APU with Radeon(tm) HD Graphics stepping : 0 microcode : 0x3000027 cpu MHz : 2781.169 ...
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5answers
10k views

Ubuntu 13.04 ram and CPU maximum support? [closed]

I'm learning about ubuntu, but I do not know the ubuntu 13.04 Ram and CPU support up to how much??? hope you help me
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1answer
1k views

Why does CPU usage spikes to 90% and more after wake from suspend on Ubuntu 13.04?

On an Acer C7 Chromebook running ChrUbunutu (not CROUTON) I noticed a problem after moving to 13.04. If I put the system to sleep and then wake it up both CPU cores spike to 90%+ usage. Soon after ...
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1answer
719 views

rhythmbox-metadata uses 100% cpu

Everytime I start rhythm box the process rhythmbox-metadata starts up and uses 100% cpu on one core, causing the computer to heat up and the fans to start rotating hard. I have an external drive with ...
0
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2answers
119 views

Which ubuntu Version should I install In this Processor type ? AMD64 or x86_64 [duplicate]

root@cmovel-lb01:~# lscpu Architecture: x86_64 >>>>>> CPU op-mode(s): 64-bit CPU(s): 4 Thread(s) per core: 1 Core(s) per socket: 4 CPU ...
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1answer
5k views

Ubuntu 13.04 - High temperature [duplicate]

I've always used Ubuntu. I installed the version (13.04) and I have a problem: the CPU's temperature is high also in normal condition. This is the response of lm-sensors: acpitz-virtual-0 Adapter: ...
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1answer
304 views

Ubuntu 13.04 detects only 2 out of 4 cores

I have just installed and updated ubuntu desktop 13.04 64-bit (3.8.0-19-generic ). I have AMD Phenom(tm) II X4 945 Processor with 4 cores, but the cpuinfo shows only 2 cores avaible. How can I enable ...
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3answers
91 views

Does using 2 OSs affect CPU speed?

I have windows 7 already installed on my laptop and I would like to know if installing ubuntu as well would affect my processor's speed. Here are the specs for the processor: ...
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1answer
380 views

8 CPU and one is at ~100% all the time

With : Ubuntu Release 12.04 (precise) 64-bit Kernel Linux 3.2.0-29-generic Intel® Core™ i7-3635QM CPU @ 2.40GHz × 8 The first CPU is always at ~70%-100% with nothing big running and it is making ...
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1answer
1k views

How to Limit the CPU usage for a process and its Children wether there is another process demands resources or not

i was wondering about something like CPUlimit to limit the process CPU usage but i am aiming to apply the same percentage of usage for its children processes too automatically without adding them ...
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1answer
724 views

Minimum and maximum cpu frequency are equal

I just noticed my laptop stared working considerably slower. I am using an updated 13.04, though the issue did not start right after the upgrade. After tracking down the issue I noticed that both ...
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1answer
2k views

Which is the correct ISO file to download Ubuntu 13.04 on a laptop with an Intel Core i5 processor? [duplicate]

The Ubuntu website automatically downloads an ISO file with the -amd64.iso suffix. I see no option to download one for an Intel processor. I don't know if it even matters or if this -amd64.iso is ...