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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Ubuntu crashes frequently

I recently moved from Windows to Ubuntu 14.04LTS 64-bit OS. Initially everything worked really well. However for the last couple of weeks Ubuntu started behaving crazy. The transition from good to ...
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55 views

High CPU by Firefox

For some days, Firefox has been consuming high CPU percentage while simply loading pages. It drops down otherwise. It often crosses 100% and even goes beyond upto 150% sometimes(!). I ran Firefox in ...
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15 views

Ubuntu equivalent of windows 8 processor power management and system cooling policy?

what is the equivalent in Ubuntu of processor power management and system cooling policy that you would find in windows 8 ? thanks
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1answer
11 views

Pin virtualbox to core(s) on precise pangolin (12.04)

I'm trying to pin VirtualBox to a few cores with taskset like so: /usr/bin/taskset -c 1-3 VirtualBox &; disown But the taskset has no effect. I have verified that taskset works with processes ...
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14 views

My cpu slows down after a while and does not recover

Sometimes, and I can't reproduce it (but it happens often enough - a few times a week at least) my cpu slows down below its prescribed minimum. This is an example cpufreq-info output from a minute ...
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1answer
13 views

Will replacing Windows 8.1 with Ubuntu limit processor fearures?

I've bought a Lenovo Thinkpad Edge E540 and am intending to replace the pre-installed Windows 8.1 with Ubuntu. Will I be able to make use of processor technologies, such as Hyperthreading, VT-x etc., ...
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28 views

Machine Check error using Nvidia drivers on 15.04

Hwæt, Hardware specs: CPU: AMD FX 8350 8-core GPU: Nvidia GeForce GT 630 Motherboard: ASUS M5A78L-M/USB3 A few weeks ago, under Trusty Tahr, I started having graphics problems. Several bad ...
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47 views

Firefox eventually for no aparent reason consumes all CPU and RAM and grinds to a halt pulling my computer along with it

I now use Firefox as my default browser and have found that after having it up and running for several hours, that it starts to use up more and more of my CPU and RAM, and this does not appear to have ...
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93 views

Dell XPS 13 2015 CPU performance on battery

I recently purchased a Dell XPS 13 with Ubuntu (i5 5200U CPU @2.7GHz) and I detected that system works slow on battery mode. cpufreq-info says: ... analyzing CPU 0: driver: acpi-cpufreq CPUs ...
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2answers
19 views

indicator-cpufreq disappearing from top bar

When I run indicator-cpufreq it shows the icon but when I leave the terminal it removes it. How can I make it permanent ?
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2answers
43 views

How to make cpupower not reset after each restart?

I use this command sudo cpupower frequency-set -u 1.5G To make the max CPU frequency to 1.5GHz but after restart it sets it back to default. How can I set this at boot ?
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3answers
51 views

Disabling Intel Turbo Boost in ubuntu

I'm new to Ubuntu and want to disable the turbo boost. I tried with cpufreq but i cant get it to work. is there any other way to do it. In windows it was as easy as changing the CPU speed from 100 ...
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25 views

14.04 - How to use integrated CPU graphics with NVIDIA driver?

I'm running Ubuntu 14.04, and am having some graphics troubles. Basically, what I want to do is have the NVIDIA driver installed, while still use CPU graphics for the display, and have my NVIDIA ...
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1answer
51 views

CPU frequency limit to 2000 on battery

I want set frequency to 2100 in battery mode but it have limit to 2000. I ran tlp ac and change CPU frequency with indicator-cpufreq to 2100 (and also check Performance) then check frequency with ...
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20 views

Is there an Ubuntu alternative for CPU core parking manager

Is there a Ubuntu alternative for CPU core parking manager (for windows) http://coderbag.com/Programming-C/CPU-core-parking-manager ? For my OpenGL app some CPUs will try to throttle and then start ...
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1answer
242 views

Why Ubuntu 15.04 with kernel 3.19.0-15 is using significantly more power?

I've recently upgraded to 15.04 and immediately noticed significantly faster battery depletion and warmer case. My MacBook Air 6,2 would easily hold 10-12 hours on battery power with Ubuntu 14.10 and ...
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1answer
27 views

temperatures files location

i want to know how to see temperature files in my Ubuntu system. I want to see the temperatures of cpu, graphics card, cheapset, etc. I know that they are somewhere on sys/class/(some people say at ...
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1answer
26 views

Process can not get more than 30% CPU

I'm running a program that is known to be CPU time consuming, but it can not get more than 30% for me which causes issues and crashes. Does anyone have an idea on maybe some parameters limiting the ...
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0answers
12 views

'Bus cycles' unavailable

Sometimes when I am booting I stuck on this... And nothing happens. I have windows in dual boot and it doesn't boot either. Now I booted when I pressed and hold power button but not as long as I want ...
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1answer
103 views

System Monitor showing incorrect number of CPUs

I'm currently running Ubuntu 14.04.2 Desktop. The System Monitor tool is showing me 32 CPUs when I'm expecting 56. Should I be concerned? Screenshot of System Monitor: As you can see, it shows 32 ...
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1answer
3k views

A weird driver appeared after upgrade to 15.04

In English this sounds something like this: Unknown: Unknown This device is not working Using Processor microcode firmware for Intel CPUs from intel-microcode (proprietary) ...
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1answer
73 views

why does /proc/cpuinfo show a single processor on the BQ Aquaris phone?

phablet@ubuntu-phablet:~$ cat /proc/cpuinfo Processor : ARMv7 Processor rev 3 (v7l) processor : 0 BogoMIPS : 2072.57 Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls ...
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24 views

Is a Beowulf cluster a solution for me?

Background I'm an undergrad working on an scientific experiment. Till now I was pilot testing our one of the program on Ubuntu 12.04 and now I need to deploy it. The PC on which I tested the program ...
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16 views

CPU problem open PDF

I've a Lenovo X1 Carbon and I've big problem opening PDF. Doing top command I get 100% cpu on xorg task. Any help?
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33 views

Incredible compiz CPU usage!

right now I'm fighting against Compiz process CPU usage :'( As you can see, it's how many CPU is compiz consuming; it's a lot and it's overheating a bit the server. Also, stands out that the ...
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1answer
26 views

Is I-nex temp reading accurate

I got I-nex and I was wondering if the cpu temperature is accurate. I have a fx-4150 and wanted to do a slight overclock. My computer is pretty much idle with only I-nex open. It says my cpu temp is ...
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40 views

High CPU usage in Ubuntu server

I have a server running Ubuntu 12.04. At certain times of the day, the CPU rises to consume its 100%: How can I fix this?
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1answer
39 views

How can I get the number of hardware level threads in my computer?

How can I get the number of hardware level threads in my computer using the ubuntu terminal?
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0answers
45 views

what is the difference between x86_64 amd64 and 64 bit

what is the difference between x86_64 amd64 and 64 bit ? I think its a stupid question but still. I use a x86_64 bit Ubuntu, but when ever I try to do a live boot of any other 64 bit images like the ...
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1answer
76 views

Ubuntu isn't using 4-cores

My notebook processor has 4 physical cores. but ubuntu is showing only 2 of them. what can i do to make ubuntu use all the cores? $ sudo lshw -C cpu *-cpu description: CPU ...
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0answers
51 views

CPU working at 100% clock spead on Ubuntu 14.04 LTS

I recently installed Ubuntu 14.04 LTS on my x64 laptop and now my CPU is working at 100% and overheating due to that. There is no software installed on the machine. I reinstalled the OS but my problem ...
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3answers
171 views

CPU frequency control

I have a kubuntu 14.04 with the latest HWE kernel (3.16.0-31-generic), and a Xeon 1246v3 processor (which is basically an i7 4770 with ecc support). The processor has base frequency of 3.5 ghz, and ...
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1answer
99 views

solved :lightdm using too much of CPU resources

I am using ubuntu 12.04. The lightdm is taking too much amount CPU constantly. I have tried restarting the system many times, but no use. Please help. lightdm version : 1.2.3 Thanks Saravanan
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22 views

Ubuntu 14.04 gets a pegged CPU exactly when I plug in a new monitor

It used to work fine with an old TV screen I had with a VGA input. Didn't use it much, rather I'd VNC in normally. Recently got a new Dell monitor and I am absolutely baffled by how the CPU spikes the ...
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116 views

Overheating shutdowns after fresh installing Ubuntu 14.04

Since 10 days I can't figure out what might cause the overheating. The machine is Samsung np300v5z : Intel Core i5 2.450 M / GeForce GT 520MX, Optimus 1Gb/ 8 GB Ram OS - Ubuntu 14.04 Things I did ...
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2answers
47 views

Know if I buy a compatible hardware

I want to buy a Micro Core I5 3340 Mother Gigabyte GA H61M S1 DDR3 4GB RAM 1TB WD SATA 3 16mb This hardware, will be compatible with ubuntu 14.04 and further? Thanks for help me :)
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2answers
61 views

Can't find what loads CPU

I'm running Ubuntu 14.10 x64 on my Dell XPS 15 9530 laptop. I noticed that my CPU is loaded pretty heavily, although I can't find the process(es) which take(s) these resources. ` Processes sorted ...
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1answer
54 views

Steam game does not use all available CPU power

When I quit a Steam game today I noticed on CPU Usage Monitor widget graph that it did not run on 100% CPU load which came as a surprise considering that simply scrolling askubuntu.com in Firefox uses ...
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43 views

AMD APU Driver Trouble

I just built a computer and installed ubuntu onto it and I'm new to ubuntu and I don't know how to install my APU driver onto my computer my APU is the AMD A6-5400k
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2answers
140 views

how to see CPU and memory usage for a program after run it

I wrote a shell script and run it with terminal.script call another programs to run and have some child process. how can i see TOTAL memory and CPU used for that script after run it ? more generaly ...
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16 views

Virtualization hardware review

I'm running an home server based on Ubuntu 14.10 for running some services that I need on my LAN such as: mysql db, LAMP stack, NFS share, Squid proxy and so. My machine is built on Intel(R) ...
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192 views

T430 i5 overheating

Heavy overheating - How to stop? I have a ThinkPad T430 running a Intel® Core™ i5-3320M CPU @ 2.60GHz × 4 (IvyBridge) on Ubuntu 14.10. I reinstalled Ubuntu a few weeks ago. While I always thought ...
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1answer
186 views

Bash script, arithmetic with floating point variables / strings that represent them

I'm trying to create a simple script that takes an average load percentage of the CPU each minute. I'm doing this by using the sar command from the sysstat package. Here is my current code: ...
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16 views

Desktop computer slowdown on heavy loads

In Linux generally, is it possible to limit cpu, ram and iops(hdd,nic..) given for processes not belonging to core operating system, including system libraries, X server, system utilities, user ...
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17 views

Athlon 5150 drivers

what is the best driver for the Athlon 5150 for general use? and does one exceed in areas where the other falls short?
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34 views

Unable to resume from stand-by

I usually let my machine suspend to ram after time X. That used to work very well but within the last few days, I have had problems multiple times to wake my machine up and get it back into working ...
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30 views

how accurate are i7z readings

I'm running a very intensive program called Gromacs on ubuntu and use i7z to monitor temperatures and CPU frequencies. I noticed that the temperature is sky rocketing in ubuntu for frequencies that ...
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62 views

Unmet dependencies. Try 'apt-get -f install'

sjp@sjp-Lenovo-IdeaPad-Y530:~$ sudo apt-get install cpu-checker [sudo] password for sjp: Reading package lists... Done Building dependency tree Reading state information... Done You might want ...
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218 views

What is the mediascanner-service and how to avoid getting it installed?

Since a few months, on one of the desktop Ubuntu 14.04 systems I use, CPU has regularly been going up to 80-100% for no apparent reason. htop would usually attribute responsability to file system ...
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1answer
67 views

When I run lscpu, then what does “Stepping” mean?

I understand other machine characteristics but the meaning of "stepping" is still not clear to me. Is this perhaps related to Speedstep?