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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lm-sensor and cpu temperatures

I am on ubuntu Precise Pangolin. The processor is Intel i3. a desktop. I installed lm-sensors and below is the report sensors gave coretemp-isa-0000 Adapter: ISA adapter Core 0: +30.0°C ...
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CPU Temperature above normal (92 C)

I have just installed Ubuntu 12.04 and after running it on my laptop for few hours I decided to check the CPU temperature with acpi -t and it said 92 degrees Celsius When I ran windows 7, it always ...
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246 views

cpu rendering graphics instead of ati hd 5470

Ubuntu 12.10 is really burning my laptop.I have an vaio laptop with ati hd 5470,i3 370m processor.Processor is used to render unity launcher transparent windows.Cpu usage is close to 100 whenever I ...
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680 views

Can't start Ubuntu - Package power limit notification

I used Ubuntu 12.10 on my current laptop for a couple of weeks without problems... Now there is no way to start it. When I try to boot Ubuntu during the startup process I get this error: [CPU0]: ...
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469 views

CPU Fan not working on acer 4755G i3 ubuntu 12.10

Hope you can help me, I'm new to ubuntu and install this 12.10 version on my acer laptop. The problem is I always got high temperature and maybe because my CPU fan is not working. Tried to install ...
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237 views

Reading cpu temperature Intel Celeron (R) with lm-sensors

I know there are already a lot of questions like this, but non of the answers provided there could fix my problem. I try to read out my cpu temperature with lm-sensors on my ubuntu 10.04 LTS ...
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Ubuntu 12.04 high CPU usage and high temperature

Ubuntu 12.04 on my laptop uses more than 50 percents of each core even if nothing is running. I have checked from system monitor and from htop, both of them show that each of 4 CPUs percentage is ...
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1answer
191 views

Power USB at certain CPU temperature

I have an unusual server set-up. Basically, I have a combination of salvaged parts from 3 Powerbook G4s running a non-graphical distribution of lubuntu. Problem is, I'm better with hardware than the ...
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Any way to check the clock speed of my processor?

Is there any way to check at which clock speed my processor is running? I have already tried cat /proc/cpuinfo but the clock speed I'm running isn't showing. I know Ubuntu 12.04 (Precise Pangolin) ...
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1k views

Ubuntu 12.10 doesn't recognize Graphic Chip in Intel Celeron G540T

I want to use Ubuntu and get away from Windows. I have bought a new Fujitsu TS ESPRIMO Q510 mini PC a few days ago. But its integrated CPU isnt properly recognized by Ubuntu 12.10. The screen ...
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1answer
202 views

How to make cpu0 offline?

I want to make cpu0 offline. I have dual core laptop. I can make cpu1 offline ( using offline file ) but can't make cpu0 offline. How to do this ?
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945 views

CPU stuck in energy save mode

A few days ago, my computer started feeling very slow, and looking a CPU usage, I saw that even the simplest processes required a lot of CPU. As far as I can tell, it's because the core are all ...
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CPU high temperature 12.10 while high CPU usage

I have a problem with high temperature of processor while running applications that use all 8 cores of processor with load of close to 100% during the all running time. And the running time for those ...
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396 views

Stop CPU from slowing down

When playing a 720p video file, I can hear the laptop CPU fan kick in which after a few minutes causes the video file to play back in a very choppy manner. Is it possible to stop the CPU from slowing ...
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1answer
2k views

Ubuntu 12.10 Laptop temperature

I'm using a laptop with a dedicated graphics card with Ubuntu and Windows 7 dual boot. Windows 7 Idle Temperature The Windows 7 idle temperature for CPU is 51°C average, and GPU is 46-48.5°C. ...
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3answers
4k views

How to step up my CPU's frequency?

I installed xubuntu 12.10 in a Fujitsu Siemens laptop with Intel Pentium M processor 1.86Ghz. I noticed that the processor's frequency that the "System information" mentions is only 800Mhz (step down ...
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4answers
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Dropbox is taking too much CPU time. How can I fix it?

I recently noticed that Dropbox is taking about 50-90% of my CPU for more than just a few seconds sometimes - mostly when downloading/syncing many or large files. Still, I guess that even when ...
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2answers
4k views

How to run Ubuntu 12.10 on a Laptop with maximum power saving? [duplicate]

I have a Toshiba L500-21T with Intel core I3 M330 2.13GHZ having 4 cores with Amd Mobility Rdeon 4500 Graphic card, 360Gb HD and 6GB DDR3 RAM. How can I run my lappy smoothly while giving me ...
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Dell Vostro 3360 laptop gets warm after 12.10 upgrade

After my yesterday upgrade to Ubuntu 12.10 my laptop (Dell Vostro 3360) gets warm without the CPU fan cooling at all. At 75° C the fan seems to be off. This will result in serious problems wen running ...
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1answer
345 views

CPU spikes to 100% when trying to watch video [duplicate]

Possible Duplicate: High CPU usage while playing Flash I just installed Ubuntu 12.04 and now CPU spikes to 100% when trying to watch a video. I don't want to hear that this is a problem ...
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1answer
407 views

Ubuntu detect 4 CPUs and i have only 2 CPU's?

I have an Acer Aspire One D270 Netbook with 2GB RAM 320GB HDD Intel Atom N2600 1.6 Ghz (2 cores) and I have a problem of overheating because Ubuntu 12.04 detects 4 CPUs. Do you know how to fix ...
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After drop of Unity2D in 12.10: How to tackle high load of Unity/compiz on netbooks? [closed]

Update: Though it's not fully clear to me why this Q should be off-topic and I have doubts that a bug report will help, I filed a bug report at https://bugs.launchpad.net/unity/+bug/1067349 Please ...
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1answer
631 views

CPU Fan really annoying

Nn a Dell Inspiron the CPU Fan is too loud. It is not running constantly, but it changes from slow to really fast every minute. It's really annoying and hardly possible to work on this machine. Is it ...
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1answer
642 views

mount.ntfs taking all the CPU (WUBI)

I installed yesterday Ubuntu following the 'click and play' instructions of the (nicely done) ubuntu website. I used WUBI. Its installed in a partition of a drive that mainly has a Windows 7 install. ...
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526 views

KVM host: Ubuntu 12.04 3.2 Kernel showing incorrect “cache size” in cpuinfo?

2x Xeon E5620 . 16 Cores altogether. /proc/cpuinfo shows cache is only @ 4096kb According to intel this should have 12MB of "smart cache". Doing searched for E5620 and CPUinfo shows the correct ...
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144 views

Byobu not displaying correct CPU temptrature

I have an AMD FX 8120 proccy that is overclocked to 4100Mhz. Since the overclocking, Byobu and other temprature reading apps (Conky, etc) do not read the temprature accurately. I can see the correct ...
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3answers
6k views

higher cpu usage in ubuntu 12.04 than windows 7

Hi I have a Intel Core i5 with 6GB of Ram using ubuntu 12.04 64bit. I noticed that whenever I run chrome which is the faster browser for me in linux) when I watch youtube, the CPU usage for Chrome ...
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1answer
771 views

How can I troubleshoot flash player/hardware conflict?

OBJECTIVE: Have a web browser on my Ubuntu install that can play youtube and hulu videos. Also would like to understand problem so that I can fix it again if I change software. Workarounds welcome, ...
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546 views

CPU Frequency is off

I'm working on overclocking my rig right now, but I need to know the cpu frequency from within Ubuntu. I've figured out that I have to run a stress test while preforming the following commands to get ...
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1answer
137 views

Creation of /proc/stat

Which function of the kernel creates and writes the information for /proc/stat. In this, would like to know when kernel gets the cpu information(recognises number of cpus). If possible can anyone ...
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1answer
12k views

Kworker consuming %100 CPU [duplicate]

Possible Duplicate: Kworker, what is it and why is it hogging so much CPU? I have a process, named kworker which is continuously consuming 100% of the CPU's computing capacity. I have tried ...
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1answer
234 views

How to maximize Java resources for gaming?

I notice that when I play Minecraft, my CPU usage is only around 15 to 20 percent, at most. Is it possible to force my computer to allocate as much RAM, CPU time, etc. to the game, in order to get the ...
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Downclock CPU reaching critical temperature

I have an HP tx1250 laptop. It always had serious overheating problems and although usually it runs fine I'm now running a continuous test for my dissertation, this brings the CPU temp close to the ...
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2answers
96 views

HELP! i cant run the machine! [duplicate]

Possible Duplicate: What is the difference between 32-bit and 64-bit and which should I choose? when i try to run the machine a messeage appear in the black screen sayinh "this kernel ...
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2answers
4k views

How can I lower the CPU temperature?

I have installed Ubuntu 12.04 on my EeePC 1015PX and I've noticed that the CPU temperature does not go below 60ºC (70 is usual). Looking at powertop it seems the 2 cores (Atom N570) are idle most of ...
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402 views

Intermittent 100% CPU running e.g. Firefox or Libre Office writer on 12.04 Unity

Occasionally some applications lock and their windows goes dark or changes colour. This has happened most frequently when running Firefox but happened today when running Libre Office Writer and ...
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Why is Ubuntu detecting only one processor core?

My processor is Intel P6100 which is a Dual Core processor. When I do cat /proc/cpuinfo this is what get varun@varun-K52F:~$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu ...
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1answer
1k views

System suggest for PowerMac G4 [duplicate]

Possible Duplicate: Is the current version of Ubuntu usable on a PPC mac? Processor: 400 MHZ (PPC 7400) Ram : 768 MB PC133 (+1 GB swap on HDD) Graphics : 256 MB HIS ATI Radeon 9550 ...
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1answer
164 views

CPU usage problem

A few days ago I bought a notebook (Asus N56VZ) and detect a problem with CPU usage. When I am surfing on the Internet or using some programs, CPU usage is jumping from 1-7% to 65-80%. Can you give ...
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3answers
5k views

How to change CPU fan speed on ThinkPad?

I checked this post on AskUbuntu, but like the OP my BIOS does not have a setting for 'smart fan'. My BIOS though has something similar called 'Thermal Performance' wherein it's already set to maximum ...
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0answers
604 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 ...
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Why does kworker cpu usage get so high?

I recently installed Ubuntu 12.04 on my Samsung laptop alongside Windows 7. Whenever I use Ubuntu (even when its idle) kworker uses almost 90% of one of 8-cores. Even though it doesn't really affect ...
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156 views

Limit overall cpu usage Ubuntu 12.04 [duplicate]

Possible Duplicate: CPU frequency scaling for 12.04? I was wondering if there is a way to limit the total cpu usage percentage? I know that you can limit the usage per process with cpulimit ...
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1answer
407 views

Netbeans 7.2 suddenly has CPU spikes and slows down completely

When I first installed Netbeans 7.2 everything was pretty smooth. But for the past couple of days I've noticed that after a few hours of usage the CPU usage begins to spike to unbearable levels. ...
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3answers
577 views

How to speed up installation?

I have an Acer 4736z with 2gb Ram and ubuntu 12.04 is running too slow for my standards. I would like to know if I am running useless processes that I am not aware of and remove packages I will never ...
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1answer
553 views

Can't find “/sys/devices/system/cpu/sched_mc_power_savings”

I'm currently working on Ubuntu 12.04 x64. A lot of manuals about power saving in Linux tells about using parameters /sys/devices/system/cpu/sched_mc_power_savings and ...
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1answer
2k views

java uses 100% CPU and cannot be stopped

I've encountered that the java-process is started without any reasing (while no java-application should be run) and after a while uses 100% of the CPU (AMD Phenom II X4) I kill it with the gnome ...
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317 views

High CPU load during flash playback [closed]

I got a CPU load indicator applet and whenever I play a flash vid I see it going through the roof and staying high. I'm running 12.04 with the latest updates, restricted extras installed. Browser is ...
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1answer
2k views

Is there a way to change the speed of a CPU fan?

I got a more powerful CPU and can see from the system load applet that whenever the CPU has got some work, the fan turns up very much. It's much louder than before even if the CPU was working hard. ...
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401 views

Question on reported processor speed in System Settings>details

I have a Gigabyte motherboard and cpu I inherited from my son when he bought a new gaming machine. I changed the BIOS from 8x to 6x multiplier as I don't need the speed and I'd rather it ran cooler ...