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)

4
votes
0answers
413 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
103 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
210 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
103 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
52 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
970 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 ( ...
2
votes
0answers
100 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
152 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
223 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
335 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
43 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
498 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
299 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
153 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
706 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
777 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
78 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
75 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, ...
1
vote
0answers
32 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
49 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
67 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
117 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 ...
1
vote
0answers
92 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
96 views

Experiencing kernel panics, freezing and network errors. Please help!

I've had my own home server now for approximately 4,5 years and it's been running fairly smooth except for some disk breakdowns etc. Although, at various times I've been having issues where the server ...
1
vote
0answers
102 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
305 views

How to disable cpu frequency scaling on MacBook Air

I am having problems disabling CPU frequency scaling on a MacBook Air 6,1 (dual core 1.4 GHz i5-4260U with hyperthreading) laptop with ubuntu 14.04. I need to disable the frequency scaling to install ...
1
vote
0answers
154 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
112 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 ...
1
vote
0answers
171 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 ...
1
vote
0answers
34 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 ...
1
vote
0answers
216 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 ...
1
vote
0answers
27 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 ...
1
vote
0answers
69 views

ubuntu halts itself in high cpu workload

I have Core i3 M370 laptop. When i do high cpu intensive tasks such as kernel compilation with make -j4, the system halts itself. It doesn't happen like instant crashing. It happens like "shutdown -h ...
1
vote
0answers
189 views

CPU high usage with no reason

I am experiencing high CPU usage and overheating with Ubuntu 14.04 on a Dell Inspiron-N5110 laptop, seemingly for no reason. CPU: Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz Cadencé à 2.30 GHz RAM: 4 ...
1
vote
0answers
202 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) ... ...
1
vote
0answers
200 views

Java & High CPU usage

I use a certain java application to trade the stock market and it consumes 90% my CPU power. And the CPU temp usually remains around 90c. This is a real headache. What causes this problem and what are ...
1
vote
0answers
118 views

CPU usage varies from 0 to 100. Strange waveform

so I have a strange problem. I'm currently using an old Thinkpad T61 and Ubuntu 14.04 LTS, although this same problem was also happening when I had elementary OS Luna (based on ubuntu 12.04 LTS) ...
1
vote
0answers
483 views

xubuntu: compiz using 100%+ cpu

I seem to be experiencing an issue with Compiz in terms of cpu usage. The only thing I've been doing differently (been running this system for a month or two with no issues) is I have been running ...
1
vote
0answers
459 views

Ubuntu 14.04 lost cores on AMD CPU

It seems that I have a problem. Installed 14.04 a few days ago, everything was smooth sailing until yesterday it wouldn't boot up. Recovery mode says that CPU's 1-6 don't respond. After 7 it moves ...
1
vote
0answers
398 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 ...
1
vote
0answers
92 views

Why my CPU of 2.1GHz clocks at 800mhz in Ubuntu 13.10?

I've a problem with my notebook DELL INSPIRON 1720. This notebook have a CPU Intel t8100 2.1GHz and it doesn't work perfectly. It works at 800MHz stable, like in power-safe. But when I change the ...
1
vote
0answers
258 views

How to find CPU shutdown temperature? (Think it's called TJMax, maybe not though…)

In Windows there is a program called CPU Temp which shows various CPU temperatures, one which being the temperature at which point the computer will shut down to prevent damage to the CPU. I have a ...
1
vote
0answers
340 views

High CPU temperature when using GNOME

I have ASUS Extensa 4220 laptop.If I install Kubuntu (any KDE-based), then the CPU temperature looks normal for a long time (now it is 74 degree Celsius). But when I install GNOME-based distros, then ...
1
vote
0answers
908 views

Xorg and compiz using 20% of CPU

I'm not doing anything in particular but Xorg is currently using 8-15% of my CPU and Compiz is using 5-15% as well. I have 4 virtual desktops (aka workspaces) and like 10 windows open but I see no ...
1
vote
0answers
303 views

Increased CPU temp compared to Windows 7

I have a Lenovo Z570 Thinkpad with windows 7. One of my friends suggested that a 4GB RAM is much more effective when working on Linux than on Windows, so I searched a lot and installed Ubuntu ...
1
vote
0answers
341 views

high interrupts

I have high Rescheduling interrupts and Local interrupts. while doing nothing my total CPU wakeups reach 275-400. While watching movies it reaches up 900-1000. And while browsing the Internet it ...
0
votes
0answers
21 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 ...