1
vote
0answers
42 views

Why my PC turned off unexpectedly?

Let me tell the complete story. I have a normal PC with monitor, CPU, UPS, mouse and a keyboard. I use Ubuntu 12.04 LTS. For the last 15 days my computer is shutting down unexpectedly. Here in my case ...
0
votes
0answers
63 views

Fan is always running (CPU)

Hp mini 1000 Using gnome shell 3.4.x When I installed this os the fan did not always run and it seems after updating now the fan has and is always running... Whether plugged in or not... Now its ...
0
votes
0answers
130 views

Heavy CPU usage with LTspice on Ubuntu 12.04 32 bit

I currently have LTspice IV installed on my ubuntu 12.04 32 bit machine through wine. I have no major problems running the actual software, but the thing that worries me is how much CPU power the ...
0
votes
2answers
395 views

high CPU usage on Ubuntu 12.04

I just installed Ubuntu 12.04 on my Asus k53s notebook. Processor is Intel® Core™ i5-2410M CPU @ 2.30GHz × 4 5.7 GiB RAM. The CPU usage gets very high after a while, specially when using internet. ...
6
votes
0answers
72 views

How to enable cpuset on Ubuntu 12.04?

I have set up CPU sets with cset in Ubuntu 12.04, but they are not respected. Processes just use all the CPU they can, no matter what set they are assigned to. It seems that cpuset is not enabled. ...
1
vote
0answers
134 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 ...
1
vote
1answer
212 views

ubuntu 12.04 - fuser high cpu

The problem is fuser high cpu and server load high. root 20 0 7580 840 692 D 10 0.0 0:00.31 fuser 16061 root 20 0 7580 844 692 D 10 0.0 0:00.31 fuser 16062 root ...
0
votes
0answers
41 views

Ubuntu 12.04 new kernel taking way more CPU usage

I recently upgraded to Linux Kernel 3.2.0-58 on Ubuntu 12.04. It works well but today I noticed that it was using 60% CPU usage of the computer. The only programs that were open were GKrellM System ...
1
vote
0answers
128 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 ...
0
votes
2answers
180 views

How do I Manually Limit CPU Usage? [duplicate]

I have an old laptop prone to overheating and a good solution I found was limiting it's CPU usage to below 50%. On Windows, I can do this by changing the power plan I am currently using, and altering ...
-1
votes
1answer
33 views

Which ubuntu 12.04.3 is best for Device lc2430i ? [duplicate]

Which Ubuntu version should I download for new Linux-certified laptop ? Device Name: lc2430i MEMORY: 3.8GiB Processor:3rd Generation Intel Core i5-3210M CPU @ 2.5GHZ X 4 (3MB L3Cache,2C+HT) OS TYPE: ...
0
votes
1answer
213 views

Ubuntu 12.04 doesn't recgonize m CPU correctly

My computer is running ubuntu 12.04 (64bit), and I have a AMD Athlon(tm) X4 760K Quad Core Processor which is about 3.8ghz (and an Radeon HD 7770 GPU). Yet, when I type in cat /proc/cpuinfo - I get: ...
0
votes
0answers
193 views

Intel TurboBoost not working under 12.04 LTS

Please help me someone :) My notebook has Intel core i5 3337U CPU with Intel turbo boost. Under 12.04 the turbo boost is not working properly. It's frequency maximum is 1.8Ghz but the CPU can run ...
2
votes
0answers
309 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 ...
1
vote
1answer
352 views

lowering CPU load average, Kubuntu 12.04

I've got a question about lowering CPU loads, if I understand correctly when I issue the 'uptime' command I get 3 values representing 5, 10 and 15 minutes of average CPU load. My current stats are ...
1
vote
1answer
61 views

Is there a way to get some notification if my ubuntu 12.04 uses 90% of CPU

Now a days, My computer is getting stuck as I m running lot of programs.What I need is a some kind of notification when processes become 90% or so.
0
votes
1answer
452 views

Acer TimelineX 4820TG fan speed out of controll after install Ubuntu 12.04

Laptop Acer Aspire TimelineX 4820TG. Dual boot Windows 7 and Ubuntu 10.10 Despite some small bugs the machine runs fantastic with this software. After installing Ubuntu 12.04 the cooling fan runs ...
4
votes
3answers
4k views

Dropbox very high CPU usage without any actual data transfer

The Dropbox process constantly clocks more than 50% CPU usage sometimes going up to the higher 80s and 90s. At the same time it does not even upload/download the files it is supposed to. The progress ...
2
votes
1answer
1k views

How to Limit the CPU usage for a process and its Children wether there is another process demands resources or not

i was wondering about something like CPUlimit to limit the process CPU usage but i am aiming to apply the same percentage of usage for its children processes too automatically without adding them ...
0
votes
0answers
32 views

Is there something Limits the CPU usage for a process and its Children [duplicate]

i was wondering about something like CPUlimit to limit the process CPU usage but i am aiming to apply the same percentage of usage for its children processes too automatically without adding them ...
1
vote
0answers
68 views

How to investigate scheduler issues?

I have a server process that should runs multiple threads at close to 100%, each on its own CPU. When I run the process on a RHEL box, the CPUs in question appear to stay pegged at 100%, according to ...
-1
votes
1answer
392 views

AMD Athlon II x2 270 performance

I want to buy a new PC. I want to know how does this CPU works fine on Ubuntu. It's an AMD Athlon II x2 270. I'm not asking for a review. I just want to know if it works fine on Ubuntu, because I've ...
1
vote
0answers
270 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 ...
3
votes
2answers
3k views

Why does Ubuntu 12.04 recognize only one processor?

I installed Ubuntu 12.04 LTS in a machine that has an Intel i3 processor. As far as I know, i3 processor is a multicore one and the OS should recognize 2 processors, just as Windows 7 does. Ubuntu ...
1
vote
1answer
106 views

CPU performance decreases with AC power

I am doing CPU-intensive work on my Thinkpad X220 laptop and I find the performance bad. Interestingly, the CPU becomes more powerful if I disconnect the AC power and run only on battery! It does slow ...
4
votes
1answer
3k views

How to fix that only one out of four cores of my CPU is detected?

I have an Acer Aspire M5640/M3640 PC, featuring a Intel Core 2 Q8200 (Quad-core) processor running Ubuntu 12.04. Now it seems to only recognize just one CPU core. lscpu outputs: Architecture: ...
1
vote
1answer
121 views

The limits is restored to the defaults after I reboot

I want to remove "memorylocked" and "maxproc" limits. I am using tcsh shell. I read that if I use "#limit memorylocked unlimited" and "#limit maxproc unlimited" then they will be set to unlimited. I ...
0
votes
1answer
424 views

Is the Atom Z2460 supported?

Couldn't find anything in the component database, I'm mostly worried about the PowerVR GPU it has. There are many Windows tablets using it and I was wondering if I could use 12.04 on it
1
vote
1answer
1k views

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 ...
8
votes
4answers
7k views

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 ...
1
vote
1answer
351 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 ...
-1
votes
1answer
150 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 ...
1
vote
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 ...
0
votes
1answer
13k 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 ...
4
votes
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 ...
0
votes
0answers
410 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 ...
0
votes
3answers
6k 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 ...
2
votes
0answers
620 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 ...
12
votes
4answers
20k views

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 ...
0
votes
0answers
157 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 ...
2
votes
0answers
40 views

Will Ubuntu Server 12.04 run on a system with 8 physical CPUs? [duplicate]

Possible Duplicate: How many maximum CPUs does Ubuntu support by default? Is it possible to run ubuntu server 12.04 on a server with 8 individual physical processors. As my server has 8 ...
3
votes
3answers
2k views

Is the CPU power management set permanently to Performance mode in 12.04?

after installing 12.04 from 11.04 and using the gnome-fallback desktop I installed the CPU scaler app in the top bar. It shows that my laptop is always running in Performance mode and never goes to ...
1
vote
1answer
2k views

interpreting Sensors command line output

I need some help in interpreting the output of sensors command : acpitz-virtual-0 Adapter: Virtual device temp1: +56.0°C (crit = +128.0°C) temp2: +67.0°C (crit = +128.0°C) temp3: ...
4
votes
1answer
2k views

CPU usage goes to 100% when I lock the screen

Whenever I lock the screen, after a certain amount of time, the CPU and the CPU fan go to their limits, and they return back to normal the moment I unlock the screen again (as shown by psensor). How ...
2
votes
3answers
1k views

Acer 5749 laptop is overheating

I have an Acer 5749 laptop with core i3 CPU. I have migrated to Ubuntu 12.04 and am experiencing a serious problem: My laptop gets really hot when I use Ubuntu. I didn't have this problem with Windows ...
0
votes
2answers
23k views

Why ubuntu 12.04 Operating System too slow..?

I was using ubuntu 10.10 from last year. every thing was Ok with that. recently I've installed Ubuntu 12.04 in place of 10.10, after installing that on my Dell laptop, I started to feel uncomfortable. ...
4
votes
2answers
2k views

Ubuntu 11 and 12 initially fast but later bogs down, CPU pegged

I started with Ubuntu 11 a few weeks ago. It's on a DELL M4300 with a OCZ SSD. Default setup, except that I've installed the proprietary NVIDIA graphics and BROADCOM wireless drivers. Dual boot ...
3
votes
1answer
533 views

Why does the system become laggy when connected to Internet?

Why when I connect my netbook to the Internet via LAN or Wifi does whole system becomes laggy? Even when in idle, the CPU monitor shows 100% usage when connected. I've had this problem about half a ...
5
votes
5answers
8k views

watchdog/0 process using all my CPU suddenly

I have a fresh installation of Ubuntu 12.04, I have been running it for about a week. Suddenly today I noticed my computer freezes every 5 seconds. I restarted the computer and I still get this. I ...
0
votes
0answers
709 views

Flash videos overloads CPU [duplicate]

Possible Duplicate: How do I fix Flash issues? During streamig flash, in Chrome or in Firefox, in few minutes after start CPU is loaded for a 100%. Previously I have never had such problem ...