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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Can I install a 64-bit version of Ubuntu on my 32-bit machine?

I have 3 GB of RAM. lscpu Architecture: i686 CPU op-mode(s): 32-bit, 64-bit
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10 views

Acer chromebook with Arm cortex A15 cpu?

I'm looking for a destop version for acer 13" chromebook with ARM Cortex-A15 by nvidia Kepler. Does/Will Ubuntu plan to support this ?
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24 views

14.04: Cannot enable intel_pstate driver on i7 620M Dell Latitude

Problem similar to this question. Using i7z and the stress utility, I've never seen CPU frequencies crossing the base frequency of 2.66GHz - although maximum Turbo Boost frequency is supposed to be ...
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1answer
22 views

Set CPU frequency scaling to wait one second before scaling down

I notice that my Kubuntu 14.10 system scales both CPU cores 1400-3400 MHz on a sub-second resolution. I believe that it is scaling down too quickly, as when I am running multiple heavy applications ...
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2answers
62 views

My CPU usage is unnecessarily high while creating a C program in Ubuntu 14.10

I have an MSI GE60 2PC Apache model Gamebook. I also use it for my collage work. It runs Ubuntu 14.10. I have a CPU usage problem while creating a ".c" file. I use the default text editor; while I ...
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11 views

Ubuntu 14 Idle - Non Activity Causes Poor Performance

I'm having an issue with Ubuntu 14. I have a touch screen and I noticed after medium to long periods of inactivity the device "throttles down" and takes a few moments to snap back. When I tap the ...
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1answer
37 views

Number of Cores v. Processor Speed

The short question: is Ubuntu/Lubuntu designed to run/utilize multi (2+) core CPUs or is CPU speed the better approach for running these distros? I am designing a new PC and specing the CPU. I have ...
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22 views

How to limit CPU usage for a process BEFORE starting it?

I read a few ways to limit CPU usage for a process, but all of them work after the process has started. I am looking for a way to do it before the process starts. Any ideas? Sorry if has already been ...
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1answer
39 views

Ubuntu 12.04: memory always above 80% and swap around 50-60%

I have been using ubuntu 12.04 on my system for a long time. Suddenly the system has become too slow and cpu utlization is always above 80%. I have attached the screenshots which displays the usage at ...
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1answer
56 views

What is the maximum RAM supported by the desktop and server editions?

I have just downloaded "ubuntu-14.04.1-desktop-amd64.iso" and "ubuntu-14.04.1-server-amd64.iso" through "http://www.ubuntu.com/". Please can someone confirm the maximum RAM that is supported. ...
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1answer
27 views

Ubuntu 14.04- 100% usage of one core

I just upgraded my Ubuntu to 14.04, and I have one small problem. One core of my i5-4670k is 100% used. There are no tasks in the background. How can I fix this?
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1answer
38 views

Incorrect CPU temperature reprted (AMD fx-6300

Psensor and hardware sensors indicator both report an incredibly low temperature on my AMD fx-6300 cpu, below 20 degrees celcius. Below is a screenshot of what it looks like within Psensor: I have ...
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61 views

ASUS laptop overheating when using Ubuntu

I've got major problems while running Ubuntu. When I have my NVIDIA GeForce card enabled, the temperature of the processor is really high. Just a little web browsing rises it up to 70 degrees celcius ...
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1answer
64 views

TLP don't change CPU frequency

I check CPU clock speed with cat /proc/cpuinfo | grep "MHz", After sudo tlp start and sudo tlp bat still frequency is 2100MHz (Maximum). Could you please help me to solve this problem? I'm using ...
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1answer
18 views

Number of cores seen by sensors

The system monitor shows 4 cores, while the output from the sensors contains info only for two cores. What is the reason of that? My cpu is Intel(R) Core(TM) i5-3317U
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1answer
56 views

Reduce CPU frequency in battery mode automatically

Is there any way to do that? Something like xbacklight and Cuttlefish
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1answer
61 views

Xubuntu 14.10 - after upgrade from 14.04 CPU Scaling not working

i upgrade my system from 14.04 to 14.10 and after that indicator-cpufreq was showing only two options: powersave and performance. After doing this: http://askubuntu.com/a/541412/353763 I was able to ...
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1answer
56 views

Ubuntu 14.04 64 bit slow how to fix?

I upgraded from Ubuntu 12.XX 32 bit to 14.04 64 bit, but the Ubuntu became slow, I have the below CPU specs with 4 GB RAM, what is the solution? salim@salim-desktop:~$ lscpu Architecture: ...
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36 views

Ubuntu 14.04.1 strange CPU increase

I have installed Ubuntu 14.04.1 64bit, kernel 3.13 on a Dell R630 server. I notice very strange behaviour. When I open top, I see that CPU has increased significantly for certain processes (custom ...
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1answer
43 views

L1 + L2 cache hardware information with lscpu different to information from Intel & Windows

My CPU is an INTEL Celeron N2930 Bay Trail-M 1.83GHZ to (2.16GHZ Turbo) I get by typing lscpu in Terminal a different value of L1 + L2 Cache (Hardware Information) in comparison to the Intel + ...
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1answer
379 views

How to automatically restart an application for using too much RAM or CPU

I'm going to be running an Ubuntu 14.04 LTS server that will have a few Garry's Mod (Half-life 2/Source based) servers running on it. I don't want any one of those servers getting out of line by ...
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43 views

Problem after upgrading CPU on Acer Aspire 5720

I have an Acer Aspire 5720 with integrated Intel graphics and it is set up to dual boot Vista and ubuntu 14.04 LTS. From new the laptop came with an Intel T7300 2.00 Ghz CPU and 1 GB DDR2 RAM. A few ...
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1answer
172 views

Lubuntu 14.10 High CPU usage and choppy video playing

I have an Asus Notebook (2007) with 1 gb ram and 900 Mhz Mobile Intel® 915GM/GMS, 910GML Express Graphics. I use Lubuntu 14.10 with about 300 mb memory usage,but the problem is high CPU usage(100 %) ...
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65 views

Overclocking with Ubuntu

I overclocked my CPU in BIOS using a multiplier. Everything in Ubuntu still shows the CPU frequency is stock. Is the CPU running at stock frequency, or is it overclocked like it's supposed to be? Is ...
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1answer
275 views

AMD E1-6010 1.35GHz slow performance?

I have just installed the 64bit version of ubuntu 14.04.1 LTS version on my low-end laptop which has a AMD Dual-Core E1-6010 Accelerated Processor (1.35GHz, 1MB L2 Cache) and 4g of ram. Been switched ...
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56 views

High CPU utilization

I have noticed recently a high CPU utilization in Ubuntu. It seems to occur often when I use Eclipse which is a java-based IDE, but I have noticed it occurring even when Java is not running. I have ...
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1answer
63 views

multi-core usage, biased towards core 2?

I have 4 cores in my system. Core 2 is frequently showing 100% usage in htop. Meanwhile Core 1,3,4 show something around 5% most of the time. Is this normal? Is there a way to better distribute Core ...
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162 views

How to set governors for Intel to work as old good ondemand?

I used to work on my laptop on ondemand governor, which was switching CPU frequency depending on CPU usage. It worked quite nice for years and had three very important advantages: low hardware ...
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0answers
17 views

Can I tap my notebook to a powerful stationary computer's CPU / GPU / RAM resources example via LAN?

THE GENESIS Currently I have a little experience with NoMachine, a great tool for cross-OS remote desktop, however this program has problems with H264 support while the codecs are actually working on ...
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69 views

Only 8 cores on Ubuntu 12.04 Desktop 32bit with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz

I got the new build machine with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz which has 6 cores and support 12 hyper thread. I installed Ubuntu 12.04 LTS 32bit Desktop version and looked at ...
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28 views

ubuntu halts itself in high cpu workload

I have Core i3 M370 laptop. When i do high cpu intensive tasks such as kernel compilation with make -j4, the system halts itself. It doesn't happen like instant crashing. It happens like "shutdown -h ...
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1answer
27 views

How to get more CPU information than by the usual ways?

I'm familiar with uname, lscpu, hwinfo, lshw, and less /proc/cpuinfo. But! None of those are telling me what I want to know about my processor. ATLAS lists these processor types: Intel PIII, with ...
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1answer
97 views

Turbo Boost work with Ubuntu [duplicate]

My notebook has an Intel Core i5-4200U 1.6GHz with Turbo Boost to 2.6GHz. My question is, will Turbo Boost work with Ubuntu?
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1answer
99 views

Should I turn on Hyperthreading on lubuntu 14.04?

Pentium 4 HT @ 3.20 Ghz Ram: 1536 MB Lubuntu 14.04 LTS To be clear, I want to know whether HT would slow Lubuntu down or not. I use it for daily use such as using Google Chrome (to be specific) and ...
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2answers
14 views

Restricting resources of user applications

Sometimes, either because of a memory leak or the computationally-intensive nature of a program, applications can start to slow down and ultimately freeze the whole system by claiming too much RAM or ...
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2answers
65 views

“sensors/sensors.h: No such file or directory”

I download the latest stable version of psensor: psensor-1.0.4. I try to install it from source on Ubuntu 12.04. ./configure generates a Makefile, But when I run make, psensor.h:22:29: fatal error: ...
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38 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. ...
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59 views

Team Fortress 2 using more CPU on Ubuntu 14.04 LTS than in Windows 8 [closed]

CPU: AMD A6-4400M APU with Radeon HD Graphics (Radeon HD 7520G) RAM: 8 GB (I use Ubuntu 64-bit) Driver using: X.org X server (not a proprietary driver) Also, I don't use wine for Team Fortress 2 ...
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70 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, ...
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0answers
65 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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0answers
79 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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0answers
16 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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76 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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1answer
65 views

provide more than one processor with taskset

I am using taskset to assign CPU cores 4-7 to a java process that normally uses ~200-400% CPU. The cores 4-7 were isolated on boot so only the java process should run on them. Eventually taskset ...
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2answers
139 views

Why does Ubuntu only recognize four processors?

I have ubuntu 14.04 and windows 7 in dual boot. My processor is the Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz. The problem is that ubuntu detects only 4 core but they should be 8 !! Is it a known ...
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1answer
62 views

Psensor warning - What does it mean?

I installed Psensor because I have had a new comp with problems, it sometimes freezes up on me. This might be caused by heat but it could be another cause. After implementing all sensors, Psensor ...
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2answers
303 views

how to fix ubuntu overheating

I'm new to Ubuntu but not to Linux and this is the first time overheating has been an issue for me. I'm using the latest version with all the updates installed and my computer has a Intel Core ...
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117 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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26 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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1answer
234 views

lm-sensors not detecting my fan

sensors-detect detects my system perfectly: # sensors-detect revision 6209 (2014-01-14 22:51:58 +0100) # System: Acer Aspire E1-572 [V2.14] (laptop) # Board: Acer EA50_HW It detects an Intel ...