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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Temperature sensors broken?

I just followed this guide to install lm-sensors on my machine but the output I get is kind of weird: asus-isa-0000 Adapter: ISA adapter cpu_fan: 0 RPM radeon-pci-0008 Adapter: PCI adapter ...
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11 views

How do you hotplug enable new CPU and RAM in a Virtual Machine

I am running Ubuntu in a virtual machine and I'd like to add CPU and RAM without rebooting the device. How can I hotplug this new virtual hardware?
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26 views

Can't disable turbo boost since Ubuntu 16.04

I've recently updated to Ubuntu latest LTS. My computer suffers from bad cooling management, and I need to be able to disable turbo boost in order to use it comfortably. I had a script that was doing ...
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2answers
15 views

totem-video-thumbnailer uses almost all CPU power

After upgrading from Ubuntu 14.04 LTS to 16.04 LTS, my laptop gets hotter and uses almost all CPU power. How to fix it? Thanks a lot for your answer...
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30 views

How to run a job in several machines that have Ubuntu as operating system

I need to run a job in several virtual machines exists in a specific cloud and I have the IP address for all of them and I configured the hostname for all of them. How to run a command in a network of ...
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5 views

Have: HP ENVY Desktop - 750-167c - Updated to Ubuntu 16.4, Need HW support

Have: HP ENVY Desktop - 750-167c Updated to Ubuntu 16.4 Need HW support! I keep getting an "HP update drivers" box when I boot the system. I click "OK" and nothing happens other than the next time I ...
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1answer
64 views

KswapD0 use 100% CPU

After upgrde from 15.10 to 16.04, I noticed my netbook fan was constantly turning at full throtle. I checked the process mnitoor and noticed KswapD0 used 100% of one core. What is the problem ? ...
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246 views

Does Ubuntu 16.04 support intel 64 bit processers [duplicate]

I am using Ubuntu 14.04 32-bit LTS for a while and I'd love to try Ubuntu 16.04 64-bit LTS. In Ubuntu download page I found 64-bit ISO image as ubuntu-16.04-desktop-amd64.iso, I am bit confused ...
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28 views

Installing gfortran and mpich for a new Ubuntu user

I am a long-term Mac user who is considering switching to Ubuntu. I am not a system guru. I program in fortran and mpi for cfd applications on high-performance computers. I am considering ...
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30 views

Does Ubuntu already support Intel Speed Shift?

Does Ubuntu already support Intel Speed Shift? If not, when will it support Intel Speed Shift? I'm looking forward to use it with my new Skylake Mobile CPU.
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22 views

kworker CPU hog - waking up from suspend

I have the (apparently very common) problem of 'kworker' hogging CPU usage. As mentioned here, the solution for many is identifying the problematic 'gpe'. This solution seems to apply to my situation, ...
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17 views

indicator-cpufreq frequency lost after suspension/hibernation

As the title, I'm using indicator-cpufreq to set the frequency of the CPU. It's really useful when you are on battery and you want to save some power. However, when I wake the laptop after a ...
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24 views

How to force enable Turbo Core (AMD) on Ubuntu 15.10?

I'm running a Samsung Ativ Book 9 lite with Ubuntu 15.10 installed. The processor is supposedly equivalent to an A6-1450 Temash 1.0 GHz (1.4GHz boost) The problem I'm having is that turbo mode only ...
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0answers
16 views

Monitor CPU and bandwidth usage of cpu and save to csv

I would like to monitor a specific process. I need to know timestamp, CPU usage (%) and Bandwidth (tcp upload and download in % or byte/s) of this process. I have tried something like this: ps -Ao ...
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1answer
48 views

Throttling stuck below limits on a cool cpu

This is an issue widely discussed earlier. Still, none of the suggested methods/procedures has worked for me. I'm running Ubuntu 14.04, kernel 4.4.0-040400-generic on a fanless mini computer, Intel ...
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2answers
35 views

Ubuntu 15.10 unable to detect all CPUs

lscpu lists the following venki@venki-H8DCL:~$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 12 On-line ...
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1answer
53 views

BayTrail CPU and Ubuntu 15.10

I have a machine with an Asrock q1900b-itx mobo and I'm experiencing random freezes of the system. By freeze I mean everything hangs and there is absolutely nothing that can be done except reset. I've ...
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33 views

CPU frequency cannot be changed 15.10

I cannot change my CPU frequency. It is stuck on 800 MHz. None of the usual avenues are working. How can I change system policy?
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30 views

Inspiron 15 fan doesn't work

System configuration Win10 and Xubuntu 15.04 Dual boot i5 4200U Radeon 8850M Latest BIOS from dell tlp on Xubuntu installed. No more tweaks. coretemp module was loaded fglrx is not installed Idle ...
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56 views

Reduce load average on Ubuntu 14.04

How to I reduce the average CPU load on Ubuntu 14.04? I have a low end PC and whenever I start Google Chrome the load average is at ~2,5-3 My Computer Specifications are: Intel(R) Celeron(R) CPU ...
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27 views

Question on Ubuntu 15.10 high CPU usage again

I have a clean installation of 15.10. Recently the system may suddenly go into high CPU usage. I tried to search the for the answer. The answer is typical to check with process is using the CPU. But ...
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44 views

Can't install software because Ubuntu thinks my Intel processor is an AMD

Today I have tried to update Chrome and also to install XnView (photo viewing software) on my desktop machine with an Intel® Core™2 Quad CPU Q6600 @ 2.40GHz × 4. Each time I get a message that I have ...
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1answer
28 views

In need of cpu monitoring tool that logs activity

I'm currently hosting a dedicated server that is running Ubuntu 14.04.3 LTS 64bit, recently ive been getting weird rare crashes/timeouts on my gameservers where players simply lag and then disconnect. ...
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35 views

Ubuntu not booting after upgrading RAM and cpu

I have a Ubuntu machine running on Hyper-V It is the 15.10 version 64 bit. I tried to shut it down and then upgrade it from 8 GB og ram to 16 GB and from 2 processor cores to 8. But when I turned it ...
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2answers
111 views

How to read lm-sensors on AMD FX 6300?

My FX 6300 sits on a ASUS M5A99FX Pro R2.0 and is currently overclocked (I did the stresstesting and such on Windows to get it stable). Now I need the socket temp and the core temps so I use lm ...
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1answer
46 views

how to improve cpu usage on Ubuntu server

I have two sessions running on Ubuntu 14.0x server, and I found that my program will take too long time to be finished. I used this instruction root@ns3011857:~# top -bn1 | grep "Cpu(s)" | \ sed ...
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68 views

Randomly CPU 100% system freeze

Use Ubuntu 14.04 on DigitalOcean and sometimes my CPU go to near 100%. Reboot help me well, but this is going on 2-3 times a day and I need to fix it. How to display what and where used 100% CPU ...
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66 views

Why is XPS 13 not able to run at maximum CPU-Speed?

I am currently running Ubuntu 14.04 an an 2015 DELL XPS (Developer Edition) and dealing with Speed-Issues, stumbled upon some strage behaviour regarding CPU-Speed. It seems, the CPU-frequency is ...
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2answers
64 views

Ubuntu 15.10 64-bit is not working very well in my PC

> System: Kernel: 4.2.0-32-generic x86_64 (64 bit) Desktop: Unity 7.3.3 Distro: Ubuntu 15.10 wily CPU: Single core Intel Pentium 4 (-HT-) cache: 1024 KB clock ...
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2answers
42 views

ubuntu 14.04 running slow on bootup and online

My apologizes right off is I do not know much about computers. My laptop crashed and was replaced by my sons college desktop computer that he built. we had a problem with windows XP on it and ...
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17 views

Massive throttling when switch from charger to battery on Ubuntu 15.10

When I watch a 1080p video on youtube, I got easy 60 frames/s. But when I plug out the charger the framerate drops below 20 f/s (even if battery is 100&). The governor is set to performance, but ...
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27 views

Using rdmsr and wrmsr in Ubuntu?

I have a 32 bit Ubuntu 14.04 Intel i5 processor, I dint find any good resources for changing the cpu voltage. I know that it is required to change some register values, but the ones I tried dint' ...
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60 views

CPU Throttling Occurring Despite No Need For It

This seems to happen in most every linux distro I try (haven't tried windows yet). I apologize in advance for the nonstandard situation in which it arose, but I will explain that after I explain the ...
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27 views

Thinkpad W510 gets slow after 5 mins of regular activity (CPU thread fully loaded)

I own a Lenovo Thinkpad W510. Since I got it, I always run into this problem, especially when running Ubuntu. After starting the laptop and using Chrome or Firefox with just 4-5 tabs open and ...
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1answer
28 views

CPU frequency controll

I have a dell latitude e6410 what has i5-520M processor. It's running between 1.2-2.4 GHz. I think my turbo is switched off. How could I turn on to achive ~3 GHz? In my previous laptop I simply used ...
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150 views

Strange cpufreq scaling issues: regardless of governor, max cpufreq drops incrementally on wake

I am running Ubuntu Mate 15.10 64bit (kernel 4.2.0) on a Lenovo y5070 with an i7-4710HQ cpu. I noticed recently (possibly after a recent dist-upgrade) that certain programs were really slow. After a ...
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1answer
164 views

How to update additional driver (Nvidia GPU and CPU)

Firstly i want my drivers up to date. So can you help me about that? And 1 more question, at CPU title we have 2 options like microwaves and do not use device. Which one i must use? I use that right ...
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2answers
89 views

Troubleshooting high Sy CPU Usage

I am running a Supermicro server with Ubuntu 14.04.4 LTS. We have an app that is maxing out the sy cpu time, while barely touching user space. I run the same app on older hardware, with Ubuntu 12.04.4 ...
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48 views

xorg is using too much of CPU

I'm using Ubuntu 14.04. xorg is using CPU too much. At normal activity it's using 50 percent of CPU. I have a hybrid graphic card and I didn't have find any solution for this. $ lspci -knn |egrep ...
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1answer
32 views

monitoring CPU time with “/proc/stat”

I must have some problems understanding "/proc/stat". In the attached calc sheet (an image in fact, because I could not add a sheet), I have recorded some collected "/proc/stat" with a 2 seconds delay ...
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1answer
41 views

Ubuntu Server 14.04.4 server setup

Need some help on my configuration on my low power server. I have a multiple applications loaded on my ASRock Q1900M Intel Quad-Core Celeron Processor with 4GB memory and 2 TB WD green drive. The ...
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24 views

CPU usage command line [duplicate]

I want to get the cpu usage. I tried this command top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}' Could you confirm if this command is correct?
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20 views

Should I use an older version of Ubuntu? [duplicate]

I just installed Ubuntu Gnome 14.04 fresh earlier today and the cpu maxes out several cores while watching Youtube videos and the cores run high while doing pretty much anything. Is Gnome my problem ...
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31 views

nagios plugin to check cpu usage in my server

check_CPU Plug-In I need Plug-In for nagios3 to check CPU usage in Ubuntu. I don't found any Plug-In for that
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1answer
56 views

number of logical cores exceed expectations

I have a system with an I3-3220 which based on Intel's info has 2 cores capable of 4 threads each (or total). However I noticed while watching htop with an avconv encode running that there were 16 ...
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80 views

Ubuntu 14.04 CPU fan issue

I just installed ubuntu 14.04 on my dell latitude e5450 and it doesn't seem like the cpu fan is working correctly. I had a 500 gb hdd in my computer and today took it out and installed a 240 gb ssd ...
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39 views

How i can activate cpu.cfs_quota_us in Cgroup?

How I can activate cpu.cfs_quota_us function in Cgroup on Debian Jessie (raspberry pi 4.1.13-v7+ kernel)? This file not exist in cpu controller after creating the group and I didn't find how I can ...
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605 views

Celeron N3050 Braswell CPU usage too high on Ubuntu 14.04

I have an intel NUC with an N3050 in it. Just running Firefox and gnome system monitor seems to keep the CPU usage at 100% (sometimes but not others)! I am using it as a media center, and first ...
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100 views

NMI watchdog on Haswell

When i'm trying to boot ubuntu on my laptop (Asus Transformer Book Trio TX201L), i'm getting this [ 60.079064] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:0] The only way i can ...
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2answers
81 views

Is it good to operate the CPU at 71 degree Celcius

My laptop configuration are Dell 3521 Core i3 3227U @ 1.9Ghz 4GB RAM Intel HD4000 graphic + radeon HD7670m 1GB DDR3 dedicated graphics. As the CPU fan runs at max from staring of ubuntu, I am using ...