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)

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 ...
0
votes
0answers
479 views

Dell XPS 13 2015 CPU performance on battery

I recently purchased a Dell XPS 13 with Ubuntu (i5 5200U CPU @2.7GHz) and I detected that system works slow on battery mode. cpufreq-info says: ... analyzing CPU 0: driver: acpi-cpufreq CPUs ...
0
votes
2answers
70 views

indicator-cpufreq disappearing from top bar

When I run indicator-cpufreq it shows the icon but when I leave the terminal it removes it. How can I make it permanent ?
0
votes
2answers
134 views

How to make cpupower not reset after each restart?

I use this command sudo cpupower frequency-set -u 1.5G To make the max CPU frequency to 1.5GHz but after restart it sets it back to default. How can I set this at boot ?
0
votes
3answers
2k views

Disabling Intel Turbo Boost in ubuntu

I'm new to Ubuntu and want to disable the turbo boost. I tried with cpufreq but i cant get it to work. is there any other way to do it. In windows it was as easy as changing the CPU speed from 100 ...
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 ...
-1
votes
1answer
141 views

CPU frequency limit to 2000 on battery

I want set frequency to 2100 in battery mode but it have limit to 2000. I ran tlp ac and change CPU frequency with indicator-cpufreq to 2100 (and also check Performance) then check frequency with ...
0
votes
0answers
194 views

Is there an Ubuntu alternative for CPU core parking manager

Is there a Ubuntu alternative for CPU core parking manager (for windows) http://coderbag.com/Programming-C/CPU-core-parking-manager ? For my OpenGL app some CPUs will try to throttle and then start ...
2
votes
2answers
1k views

Why Ubuntu 15.04 with kernel 3.19.0-15 is using significantly more power?

I've recently upgraded to 15.04 and immediately noticed significantly faster battery depletion and warmer case. My MacBook Air 6,2 would easily hold 10-12 hours on battery power with Ubuntu 14.10 and ...
0
votes
1answer
51 views

temperatures files location

i want to know how to see temperature files in my Ubuntu system. I want to see the temperatures of cpu, graphics card, cheapset, etc. I know that they are somewhere on sys/class/(some people say at ...
1
vote
1answer
62 views

Process can not get more than 30% CPU

I'm running a program that is known to be CPU time consuming, but it can not get more than 30% for me which causes issues and crashes. Does anyone have an idea on maybe some parameters limiting the ...
1
vote
0answers
35 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 ...
2
votes
1answer
736 views

System Monitor showing incorrect number of CPUs

I'm currently running Ubuntu 14.04.2 Desktop. The System Monitor tool is showing me 32 CPUs when I'm expecting 56. Should I be concerned? Screenshot of System Monitor: As you can see, it shows 32 ...
5
votes
1answer
8k views

A weird driver appeared after upgrade to 15.04

In English this sounds something like this: Unknown: Unknown This device is not working Using Processor microcode firmware for Intel CPUs from intel-microcode (proprietary) ...
1
vote
2answers
175 views

why does /proc/cpuinfo show a single processor on the BQ Aquaris phone?

phablet@ubuntu-phablet:~$ cat /proc/cpuinfo Processor : ARMv7 Processor rev 3 (v7l) processor : 0 BogoMIPS : 2072.57 Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls ...
2
votes
0answers
153 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 ...
0
votes
0answers
36 views

CPU problem open PDF

I've a Lenovo X1 Carbon and I've big problem opening PDF. Doing top command I get 100% cpu on xorg task. Any help?
0
votes
0answers
94 views

Incredible compiz CPU usage!

right now I'm fighting against Compiz process CPU usage :'( As you can see, it's how many CPU is compiz consuming; it's a lot and it's overheating a bit the server. Also, stands out that the ...
0
votes
1answer
78 views

Is I-nex temp reading accurate

I got I-nex and I was wondering if the cpu temperature is accurate. I have a fx-4150 and wanted to do a slight overclock. My computer is pretty much idle with only I-nex open. It says my cpu temp is ...
0
votes
0answers
115 views

High CPU usage in Ubuntu server

I have a server running Ubuntu 12.04. At certain times of the day, the CPU rises to consume its 100%: How can I fix this?
1
vote
1answer
225 views

How can I get the number of hardware level threads in my computer?

How can I get the number of hardware level threads in my computer using the ubuntu terminal?
0
votes
0answers
616 views

what is the difference between x86_64 amd64 and 64 bit

what is the difference between x86_64 amd64 and 64 bit ? I think its a stupid question but still. I use a x86_64 bit Ubuntu, but when ever I try to do a live boot of any other 64 bit images like the ...
0
votes
1answer
338 views

Ubuntu isn't using 4-cores

My notebook processor has 4 physical cores. but ubuntu is showing only 2 of them. what can i do to make ubuntu use all the cores? $ sudo lshw -C cpu *-cpu description: CPU ...
0
votes
0answers
139 views

CPU working at 100% clock spead on Ubuntu 14.04 LTS

I recently installed Ubuntu 14.04 LTS on my x64 laptop and now my CPU is working at 100% and overheating due to that. There is no software installed on the machine. I reinstalled the OS but my problem ...
0
votes
3answers
2k views

CPU frequency control

I have a kubuntu 14.04 with the latest HWE kernel (3.16.0-31-generic), and a Xeon 1246v3 processor (which is basically an i7 4770 with ecc support). The processor has base frequency of 3.5 ghz, and ...
0
votes
1answer
259 views

lightdm using too much of CPU resources

I am using ubuntu 12.04. The lightdm is taking too much amount CPU constantly. I have tried restarting the system many times, but no use. Please help. lightdm version : 1.2.3 Thanks Saravanan
0
votes
0answers
33 views

Ubuntu 14.04 gets a pegged CPU exactly when I plug in a new monitor

It used to work fine with an old TV screen I had with a VGA input. Didn't use it much, rather I'd VNC in normally. Recently got a new Dell monitor and I am absolutely baffled by how the CPU spikes the ...
0
votes
1answer
226 views

Overheating shutdowns after fresh installing Ubuntu 14.04

Since 10 days I can't figure out what might cause the overheating. The machine is Samsung np300v5z : Intel Core i5 2.450 M / GeForce GT 520MX, Optimus 1Gb/ 8 GB Ram OS - Ubuntu 14.04 Things I did ...
-1
votes
2answers
77 views

Know if I buy a compatible hardware

I want to buy a Micro Core I5 3340 Mother Gigabyte GA H61M S1 DDR3 4GB RAM 1TB WD SATA 3 16mb This hardware, will be compatible with ubuntu 14.04 and further? Thanks for help me :)
0
votes
2answers
111 views

Can't find what loads CPU

I'm running Ubuntu 14.10 x64 on my Dell XPS 15 9530 laptop. I noticed that my CPU is loaded pretty heavily, although I can't find the process(es) which take(s) these resources. ` Processes sorted ...
0
votes
1answer
112 views

Steam game does not use all available CPU power

When I quit a Steam game today I noticed on CPU Usage Monitor widget graph that it did not run on 100% CPU load which came as a surprise considering that simply scrolling askubuntu.com in Firefox uses ...
1
vote
2answers
555 views

how to see CPU and memory usage for a program after run it

I wrote a shell script and run it with terminal.script call another programs to run and have some child process. how can i see TOTAL memory and CPU used for that script after run it ? more generaly ...
0
votes
0answers
21 views

Virtualization hardware review

I'm running an home server based on Ubuntu 14.10 for running some services that I need on my LAN such as: mysql db, LAMP stack, NFS share, Squid proxy and so. My machine is built on Intel(R) ...
1
vote
1answer
453 views

T430 i5 overheating

Heavy overheating - How to stop? I have a ThinkPad T430 running a Intel® Core™ i5-3320M CPU @ 2.60GHz × 4 (IvyBridge) on Ubuntu 14.10. I reinstalled Ubuntu a few weeks ago. While I always thought ...
3
votes
1answer
306 views

Bash script, arithmetic with floating point variables / strings that represent them

I'm trying to create a simple script that takes an average load percentage of the CPU each minute. I'm doing this by using the sar command from the sysstat package. Here is my current code: ...
0
votes
0answers
20 views

Desktop computer slowdown on heavy loads

In Linux generally, is it possible to limit cpu, ram and iops(hdd,nic..) given for processes not belonging to core operating system, including system libraries, X server, system utilities, user ...
0
votes
0answers
42 views

Athlon 5150 drivers

what is the best driver for the Athlon 5150 for general use? and does one exceed in areas where the other falls short?
0
votes
0answers
47 views

Unable to resume from stand-by

I usually let my machine suspend to ram after time X. That used to work very well but within the last few days, I have had problems multiple times to wake my machine up and get it back into working ...
0
votes
0answers
83 views

how accurate are i7z readings

I'm running a very intensive program called Gromacs on ubuntu and use i7z to monitor temperatures and CPU frequencies. I noticed that the temperature is sky rocketing in ubuntu for frequencies that ...
0
votes
0answers
99 views

Unmet dependencies. Try 'apt-get -f install'

sjp@sjp-Lenovo-IdeaPad-Y530:~$ sudo apt-get install cpu-checker [sudo] password for sjp: Reading package lists... Done Building dependency tree Reading state information... Done You might want ...
9
votes
1answer
2k views

What is the mediascanner-service and how to avoid getting it installed?

Since a few months, on one of the desktop Ubuntu 14.04 systems I use, CPU has regularly been going up to 80-100% for no apparent reason. htop would usually attribute responsability to file system ...
1
vote
1answer
189 views

When I run lscpu, then what does “Stepping” mean?

I understand other machine characteristics but the meaning of "stepping" is still not clear to me. Is this perhaps related to Speedstep?
0
votes
2answers
884 views

Xubuntu pentium 4 not enough CPU for development

I installed ubuntu 14.04LTS lately on an old pentium 4 with 1Gb of ram. It was unusable. I moved to Xubuntu and added another Gb of ram for a total of 2Gb. I set the swapiness to 10. All these changes ...
0
votes
0answers
97 views

SCHED_BATCH policy for schedtool in Ubuntu 14.04

The INSTALL file of schedtool says that the SCHED_BATCH policy (-B) is implemented in kernels 2.6.16+. However, I am unable to use this policy in Ubuntu 14.04 (kernel 3.13.0-45)? The output of ...
0
votes
0answers
77 views

What in install.sh in Kubuntu 14.04?

My laptop fan is sometimes loud when running Kubuntu 14.04, I guess it is because of one process taking 12-13% of CPU memory. I am new with KDE/Kubuntu. What is that? Should it be running like ...
1
vote
4answers
351 views

Can I get a 100% dedicated CPU to my critical process?

I am looking for a way to get a consistent time measurement (<1% difference between the different runs) for my program under Ubuntu 14.04. perf stat shows that I still get quite a few context ...
0
votes
1answer
348 views

Are those temperatures high for my computer?

I've just erased Windows 7 because I got so pissed off at him and decided to replace it with Ubuntu 12.04. Im kinda new to Ubuntu and I´ve downloaded Psensor since I was feeling my notebook a little ...
6
votes
2answers
4k views

Why does chrome use excessive amounts of CPU?

Synopsis For the past few weeks, i've really started to notice a process on my machine hitting the CPU. So today I have taken a look into it, to find that Chrome is running about 100% CPU. Is ...
0
votes
2answers
370 views

What are the non-gaming benefits of a dedicated GPU? [closed]

I am getting ready to purchase a new computer. I don't do any gaming really at all. I mostly will be compiling code, editing video and pics, compiling apps, etc. I do like good graphics performance ...
0
votes
1answer
119 views

Disabling CPU “permanently” [duplicate]

As some of you may know, there is a common problem in some old notebooks, between battery and adapter, which is when charger plugged in, computer restarts itself, and this is a real pain in the neck. ...