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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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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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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problem CPU Frequency scalling indicator [closed]

I try install CPU Frequency scaling indicator from this step by step post and I received this error: Can you help me to fix this issue?
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16 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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30 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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33 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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36 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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65 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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42 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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81 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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83 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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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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93 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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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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54 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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42 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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31 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
104 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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14 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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147 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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167 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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14 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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13 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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26 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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16 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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48 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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85 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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297 views

Xubuntu pentium 4 not enough CPU for development

I installed ubuntu 14.04LTS lately on an old pentium 4 with 1Gb of ram. It was unusable. I moved to Xubuntu and added another Gb of ram for a total of 2Gb. I set the swapiness to 10. All these changes ...
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24 views

SCHED_BATCH policy for schedtool in Ubuntu 14.04

The INSTALL file of schedtool says that the SCHED_BATCH policy (-B) is implemented in kernels 2.6.16+. However, I am unable to use this policy in Ubuntu 14.04 (kernel 3.13.0-45)? The output of ...
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38 views

What in install.sh in Kubuntu 14.04?

My laptop fan is sometimes loud when running Kubuntu 14.04, I guess it is because of one process taking 12-13% of CPU memory. I am new with KDE/Kubuntu. What is that? Should it be running like ...
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4answers
120 views

Can I get a 100% dedicated CPU to my critical process?

I am looking for a way to get a consistent time measurement (<1% difference between the different runs) for my program under Ubuntu 14.04. perf stat shows that I still get quite a few context ...
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1answer
85 views

Are those temperatures high for my computer?

I've just erased Windows 7 because I got so pissed off at him and decided to replace it with Ubuntu 12.04. Im kinda new to Ubuntu and I´ve downloaded Psensor since I was feeling my notebook a little ...
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235 views

Why does chrome use excessive amounts of CPU?

Synopsis For the past few weeks, i've really started to notice a process on my machine hitting the CPU. So today I have taken a look into it, to find that Chrome is running about 100% CPU. Is ...
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80 views

What are the non-gaming benefits of a dedicated GPU? [closed]

I am getting ready to purchase a new computer. I don't do any gaming really at all. I mostly will be compiling code, editing video and pics, compiling apps, etc. I do like good graphics performance ...
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Ubuntu 14.10 Kworker using once cpu core to 80 % [duplicate]

I've encountered a problem with my ubuntu/lubuntu distribution regarding laptop overheat/abnormal cpu usage, pstate intel driver (I thought that this new driver overheated my laptop etc.) First of all ...
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60 views

Disabling CPU “permanently” [duplicate]

As some of you may know, there is a common problem in some old notebooks, between battery and adapter, which is when charger plugged in, computer restarts itself, and this is a real pain in the neck. ...
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108 views

Ubuntu 12.04 Laptop Heating problem

I have dual booted Windows 8 with Ubuntu 12.04. When I use Windows the temperature remains normal but when i use Ubuntu my laptop gets heated up and the temperature goes to 70-90 degrees C just after ...
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54 views

Touch screen not working after some reboots (another reboot resolves it)

I am trying to troubleshoot an issue on a Lenovo Flex 14 with Ubuntu 14.04.1 (standard Unity flavour) with touchscreen. Mostly it works perfectly well; but from time to time I reboot (mostly ...
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192 views

How to avoid high CPU fan speed while running genymotion virtual device?

I have installed Genymotion for emulation and whenever i run a genymotion virtual device, the CPU fan starts running on high speed. I have : Ubuntu 14.04 64-bit Bumblebee installed How can i avoid ...
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this kernel requires an x86-64 CPU, but only detected an i686 CPU But i have a 64bit PC! [duplicate]

I am on 64-bit Windows 8.1. I'm trying to install Ubuntu on VirtualBox. However, I get the error: this kernel requires an x86-64 CPU, but only detected an i686 CPU Unable to boot - please use a ...
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37 views

How to reduce CPU load when Video is minimized?

How can I tell VLC or Unity to stop rendering or drawing Video when the Window is minimized to reduce CPU load. Using VLC and Ubuntu 14.10 Watch Video Observe CPU load Minimize Video Observe CPU ...
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167 views

Why is CPU base Intel Atom N270 of Eee PC 1000H overheating when using Xubuntu 14.04.1?

Freshly installed Xubuntu 14.04.1 LTS on my Eee PC 1000H. CPU base is very quickly overheating, the temperature of this Intel Atom N270 goes to over 73 Celsius while I'm only running a lightweight web ...
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473 views

Nvidia 331 driver, Ubuntu 14.04 and Wine - lags, fps drops and surprising, temporary boost

I experience weird fps drops while playing games, mostly with Wine. Some tested games: Hearthstone - fps drops happens pretty often; interesting fact is that while browsing cards every page needs ...
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29 views

Priority goes back to 20 after changing it to -10

I want to change the priority of a process in LTS 14.04. I used sudo renice -10 -p PID It worked fine, but after a while the priority of that process goes back to 20. What am I missing here?
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Subdivide CPU usage among different tasks in LTS 14.04 [duplicate]

I am fairly new to UBUNTU and maybe this is a naive question. I am working on a PC with multiple CPUs and I was wondering if there is a way to select how many CPUs a process has to use. For example: ...
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118 views

Suddenly Black Screen and CPU fan high speed with CPU2 100% usage

I am a newbie at Ubuntu on a Fujitsu T8300 laptop with 2.4Ghz 2GB ram. My problem is that when I open multiple file or firefox, CPU2 goes to 100% and CPU1 < 50% and suddenly the screen goes black. ...
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105 views

mtrr log says that my BIOS doesn't use all CPU's?

In my dmesg log I see the following lines about my CPU not having al CPU's set up. [ 0.211558] mtrr: your CPUs had inconsistent variable MTRR settings [ 0.211559] mtrr: probably your BIOS does ...
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fan control issues on Toshiba Satellite c655d-s5136

On Ubuntu 14.04, my fan always runs,even when idle. This is not the case when I am in Win7,in which it only runs when I am playing movies. This bothers me greatly and I have followed other threads ...
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My machine is 32 bit, but i have 64 bit processor. Should I install 64 bit ubuntu?

I was interested in what machine do i have so after sudo lshw I've got info, but there is one thing that puzzles me. It writhes that my laptop is 32 width, but for cpu that it is 64 width ...
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994 views

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