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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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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4 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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8 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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6 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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27 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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30 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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2answers
185 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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14 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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30 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
98 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
68 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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1answer
102 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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2answers
64 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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25 views

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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1answer
49 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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1answer
83 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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1answer
38 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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1answer
98 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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1answer
66 views

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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28 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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119 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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1answer
397 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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1answer
28 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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12 views

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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62 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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1answer
47 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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63 views

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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2answers
62 views

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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2answers
609 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
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0answers
26 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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1answer
52 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
161 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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16 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
63 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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34 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
58 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
84 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
91 views

Ubuntu 14.04- 100% usage of one core [closed]

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
141 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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206 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
246 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
30 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
136 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
167 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
92 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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61 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
105 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
442 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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81 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
294 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 %) ...