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.

learn more… | top users | synonyms (1)

5
votes
0answers
556 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, ...
4
votes
0answers
3k views

Ubuntu CPU load

I'm new to Linux world and I have a problem with my fresh installation of Ubuntu 14.10 64-bit. My processor is Intel® Pentium(R) D CPU 2.80GHz × 2 with 4 GB of ram and GeForce 8600 GT/PCIe/SSE2. When ...
3
votes
0answers
220 views

Software and Updater consumes 100% CPU in Ubuntu 16.04

I've upgraded my laptop (Lenovo Z50-70) which has an i7 CPU and 8Gigs of Ram to Ubuntu 16.04 from 15.10. I've been installing updates consistently. I'm using ubuntu with Gnome desktop environment (GDM)...
3
votes
0answers
44 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 ...
3
votes
0answers
145 views

Only one CPU is being used

I am running ubuntu 12.04.5, have an Asus N53sv and I am have the same problem as the post below, but becuase my bios is different I can not apply the same fix. How to fix that only one out of four ...
3
votes
0answers
519 views

High CPU with web streaming videos

Every time I start watching some video within a browser (both Firefox 40.0 and Chrome 44.0.2403.157 64-bit with no extensions) the CPU usage gets 100% (according to htop and system monitor) freezing ...
3
votes
0answers
2k views

What causes high CPU usage by mount.ntfs?

I'm in Ubuntu 14.04 64-bit. mount.ntfs use high CPU--40%. I have Intel Core i5-3210M. Why is this happening? lsblk: NAME FSTYPE SIZE MOUNTPOINT LABEL sda 465.8G ...
3
votes
0answers
108 views

One of my two cores suddenly flatlines at zero percent

I've been using Ubuntu for about three months, and twice now the first core of my dual-core laptop suddenly flatlined at zero percent for no apparent reason, while the second one seemed unaffected. ...
3
votes
0answers
3k views

Fan always on and overheating problems on HP G62

I have a HP G62 with i5 processor, 4G Ram and ATI HD 5470. Started using Ubuntu 4 months ago, first was 11.10 and after 12.04. Everything worked perfectly until some weeks ago when my cpu fan became "...
2
votes
0answers
40 views

Ubuntu 16.04 random freezes every few hours

I am using an old AIO PC with a core i5 and every few hours the pc just freezes and doesn't respond to commands, sometimes I get a message saying, BUG: CPU#3 stuck for 23s! In these cases the magic ...
2
votes
0answers
260 views

gnome-keyring-d uses CPU too much

I'm using 14.04 LTS and always monitoring how much CPU resources are used by processes. gnome-keyring-d always attracts my attention by using too much CPU - almost 10%. After about 5 minutes OS ...
2
votes
0answers
57 views

Debugging kernel running on AMD target from Intel host - how to return control to gdb?

I have compiled kernel 3.13.0-55 on Ubuntu on both AMD and Intel machines. I tried to copy compiled kernel to Intel target but it won't boot with that one. Therefore I have compiled the same version ...
2
votes
0answers
2k views

Why aren't all of my CPU cores always detected in ubuntu 14.04 with an Intel Core Duo 2 CPU?

I'm using Ubuntu 14.04.2 LTS with kernel 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux. Computer model: iMac Late 2009 ( https://support.apple....
2
votes
0answers
140 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 ...
2
votes
0answers
147 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 ...
2
votes
0answers
188 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 ...
2
votes
0answers
227 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) ... ...
2
votes
0answers
461 views

How to find out which service uses a certain CPU core?

How can I find out which process/application uses Core number 4? As I saw in Htop there isn't any application which uses high CPU, but still my fan is running "wild" and also the CPU graphic in Htop ...
2
votes
0answers
253 views

Banshee CPU usage > 100%

Banshee CPU usage peaks and maintains >= 100% (according to htop) when I do simple, nontrivial things. Even deleting files via Banshee results in >= 100% CPU usage. I have tried several ...
2
votes
0answers
387 views

ubuntu 12.04 Init process provokes memory leak and CPU intensive usage

I have lately been having some memory and CPU issues with init process. After rebooting, the memory used by it keeps increasing at quite high pace, and after half hour it occupies all the memory RAM (...
2
votes
0answers
45 views

ubuntu black screen appears

I am using ubuntu 12.4 in that we have installed 2Gb RAM dual core processor I have installed some of the software like eclipse , SQL . while using these software's few seconds screen goes into black ...
2
votes
0answers
533 views

In Ubuntu 12.04, odd whining/humming coming from left side of MBP (2,2)

I have been searching for a similar issue to mine, but unfortunately haven't found anything. Anyhow, this week I installed 12.04 on my 2006 MBP (2,2). Pretty much everything seems to work OK, but ...
2
votes
0answers
303 views

ubuntu 12.10 64-bit consuming 100% cpu power and high battery

I am new linux user, installed ubuntu 12.10 (64-bit) from wubi (getting boot option (windows7/ubuntu). But after opening ubuntu, laptop gets heat up, fan running very fast and performance is very ...
2
votes
0answers
157 views

CPU fan kicks in to full gear when i try to install ubuntu 12.10 or LTS

Whenever I try to install (DUAL BOOT WITH WINDOWS 7) both versions of Ubuntu desktop on my PC the CPU fan starts spinning so fast that I couldn't even go through the installation for fear of my CPU ...
2
votes
0answers
756 views

Screenlets RingSensors has to many CPU sensors, what are they?

I just installed screenlets to get some onscreen information about my system. I'm trying the RingSensors screenlet to monitor cpu load, but there are more sensors available to monitor than I'd expect. ...
2
votes
0answers
815 views

Why is only one CPU detected on a Macbook with a dual-core processor?

I have a January, 2009 Macbook5,2. It has an Intel Core 2 Duo 2Ghz processor. Since installing Xubuntu 12.04, it runs very slowly. The CPU gadget in the top panel shows only 1 dark column to the left ...
1
vote
0answers
15 views

Xubuntu 16.04 on VMWare throws CPU error

I have Xubuntu 16.04 x64 on my virtual machine. Always everything are working good but today I got an error: When I enter into "Advanced options for Ubuntu" and choose this option My machine is ...
1
vote
0answers
50 views

CPU is at 100% all the time?

I'm running on Ubuntu 16.04 and for some reason, the CPU is always at 100% even when no application is running. Please help !
1
vote
0answers
82 views

Not shutting down: CPU soft lockup (plymouthd) / self-detected stall on CPU

When I click Shut down in the system menu, it does not turn off but repeatedly shows the errors below. MMI watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [plymouthd:4693] INFO: rcu_sched self-...
1
vote
0answers
109 views

AMD A10 8700p overheats on Ubuntu 16.04

I recently got a HP Envy 15 ah150na laptop with an AMD A10 8700p CPU and and R6 8700p integrated graphics card. The problem is that the CPU temperature after 10-15 minutes of usage goes up to around ...
1
vote
0answers
18 views

Certified HP server Intel CPU versions for Ubuntu 16.04 LTS?

The web-page http://www.ubuntu.com/certification/hardware/201509-19196/ indicates that the HP Proliant DL160 Gen9 server with processor Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz has been awarded the ...
1
vote
0answers
36 views

Xubuntu becomes very laggy after hours

When I start my laptop, there is no problems : no lag, it's not superfluid but it's OK. After few hours (~4/5 hours) Ubuntu and Gnome suddenly become very very slow : 3 or 4 seconds of delay when I ...
1
vote
0answers
28 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 ...
1
vote
0answers
21 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 ...
1
vote
0answers
115 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 ...
1
vote
0answers
77 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 ...
1
vote
0answers
198 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 ...
1
vote
0answers
92 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 ...
1
vote
0answers
71 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 ...
1
vote
0answers
181 views

Abnormal fan behavior: Sticking and persist on max speed (HP Envy 6-1154er & Ubuntu 14.04)

1. I have HP Envy 6-1154er under Ubuntu 14.04 LTS. I encountered the invalid fan behavior. As cpu load grows and if it makes fan to work on max speed the speed never goes back to "silent mode". When ...
1
vote
0answers
99 views

Libreoffice 5 in ubuntu 15.10 raising system temperature

I'm using 15.10 upgraded from 15.04 and when I open some documents with new Libreoffice5, the system temperature goes to 60-65ºC (or more!), when normally stands between 45º and 50º. Also, system-...
1
vote
0answers
51 views

How can I prevent `convert` from causing my system to grind to a halt?

When I run ImageMagick to create an animated GIF from a large number of images, it uses resources such that my i7 system becomes unusable. Within seconds of starting, everything freezes and, ...
1
vote
0answers
52 views

Unable to install Spotify on Ubuntu 15.04. Where do I find package spotify-client?

I have followed the basic instructions that Spotify.com provides, running the commands. But after running them all I get a message saying "Unable to locate package spotify-client". Now, I read ...
1
vote
0answers
118 views

Can Ubuntu tablet run on an A7 CPU?

I was wondering if Ubuntu tablet is companionable with A7 CPUs such as the ones that were released in the new kindle fire. I know they are compatible with A15 cpus.
1
vote
0answers
219 views

intel pstate, turbo always on cpu temp is 60 and without only ~43

I have a problem with pState on my Thinkpad L450 with Intel 5200U (broadwell) + SSD. When I use pstate, the turbo mode is nearly always turned ON and my CPU fan is also always ON because cpu temp is ...
1
vote
0answers
103 views

CPUpower sets the frequency by itself

Whenever I try to change the governor or CPU frequency with CPUpower, after 10-20 seconds it starts to go up again.Lets say I set the maximum CPU frequency to 1.5GHz it will go to 1.76GHz and then to ...
1
vote
0answers
407 views

Proprietary Intel driver for processor microcode firmware seems to disable overclocking

I installed Ubuntu 14.04 on Asus B85M-G motherboard with G3258 CPU. This CPU has good overclocking possibilities and I was able to overclock it without hassle. Due to minor issues with hibernation and ...
1
vote
0answers
193 views

CPU number differs in 'About this computer' and /cpu/cpuinfo

Question: I'd like to ask what may cause that there are two different informations about the number of processors. See the reports below. System dialog: If open the System settings/Details tab (...
1
vote
0answers
226 views

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 ...
1
vote
0answers
187 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 ...