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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System hangs when I use Terminal

I just bought a computer with X10DAi Supermicroe mb ,e5-2683 v4 CPUs, two GEFORCE® GTX 1080 and one HD 6450. After I installed Ubuntu 16.04 and tested it for two hour, the system hang on ...
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42 views

CPU frequency is always at minimum, even if CPU isage is 100%

I don't know when this issue began to happen, it might have been since the time I installed Ubuntu (16.04, fresh). I was observing that Ubuntu was unusually slow, environment was choppy and CPU usage ...
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0answers
74 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-...
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1answer
38 views

CPU scaling: how can current frequency be out of min-max range?

I'm trying to understand why my CPUs don't run at higher frequencies (related link) Can someone explain me how is it possible that when a min and a max are defined, the effective value finally goes ...
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2answers
38 views

Wrong Minimum frequency Core i7 CPU

The problem with my Linux machine is, the frequency reported by the files cpuinfo_min_freq and scaling_min_freq show 1200000 but in Windows it can be slowed down to 900000. This causes my Laptop to ...
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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 ...
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1answer
20 views

CPU Running 50% or higher on HP Pavilion dv6

I have been running Ubuntu 14.04 on my HP Pavilion dv6 for 2 and half years now. For the most part, it runs perfect, however recently I have discovered CPU monitors and have realized that my CPU is ...
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10answers
359k views
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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 ...
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1answer
626 views

KswapD0 use 100% CPU

After upgrde from 15.10 to 16.04, I noticed my netbook fan was constantly turning at full throtle. I checked the process mnitoor and noticed KswapD0 used 100% of one core. What is the problem ? ...
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7answers
155k views

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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0answers
49 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 !
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1answer
80 views

Cooling fan never reaches high speed, even if clearly needed

CPU consumption goes very high (which obviously shouldn't) when watching video on Chrome. This is due to some regression that has appeared recently (it wouldn't happen before), but that is not the ...
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0answers
18 views

90% CPU USAGE when I watch videos and so much LAG

my Computer LAG every time when I open any video mainly on youtube and the cpu usage Reach on 90% (firefox) and if I use blender or any graphic software that supposed to bug if I have hardware ...
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3answers
296 views

What information does my processor spec contain?

I have Intel® Core™ i5-5200U CPU @ 2.20GHz × 4. I want to know what does every single thing mean. $ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 61 model ...
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0answers
107 views

TLP not working on 16.04

I installed TLP on my laptop and set it up so that it should switch to powersave when on battery but it's not working. when I run tlp-stat -p this is the output when on AC: --- TLP 0.8 -------------...
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1answer
7k views

How do I know my fan is working in Ubuntu

I just bought a brand new netbook and am worried the fan isn't working properly. lm-sensors does not detect a fan, I can't hear a fan, and can't feel air blowing out of the fan area. The netbook is ...
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1answer
66 views

d a Can't scale frequencies of AMD Turion CPU, it always jumps to lowest

I have similar problem to this: Can't scale frequencies, always jumps to lowest . This time on a HP Compaq 6715B notebook with AMD Turion CPU TL-58 and powernow-k8 cpufreq driver : $ cpufreq-...
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1answer
4k views

High CPU usage while playing Flash and using Jupiter

Hi guys from what I see by Googling around it's a common problem but somehow all the threads I've seen end in "Oooo Flash is terrible" and the post dies there. I'm experiencing a very high CPU usage ...
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0answers
552 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, ...
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0answers
56 views

Is there a reliable method to determine CPU temperature?

What I would like to ask may seem something like a duplicate, but - according to my recent searches - it is not. I have a Pc with ASUS M5A97 EVO R2.0, FX-8320 and GTX960 and I would like to monitor ...
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2answers
1k views

How do you prevent CPUs from being throttled when battery is taken out of Laptop (aka only on AC power)?

My laptop CPUs are throttled down to .8GHz instead of 2.5GHz whenever I am connected to AC only and not the battery. I tried using cpufreq-set and it allows me to set the speed when the battery is ...
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1answer
602 views

Can't scale frequencies, always jumps to lowest

The title pretty much explains it. I know this is not a hardware issue. CPU is an Intel Core Duo Output of cpufreq-info: cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors ...
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2answers
2k views

Psensor only shows HDD and CPU usage, not temperature

Okay I have psensor installed, I installed lm-sensor and some other related packages, I ran sensors-detect and didn't come up with anything. It is only showing my HDDs, and my CPU usage not ...
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0answers
105 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 ...
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1answer
66 views

CPUs are overused with internet browsers, maybe Ubuntu+i5+JS don's work well

I'm having trouble with the Ubuntu 14.04 on PCs Intel NUC i5 8 GB RAM SSD HD. They are used mostly with Google Spreadhseets and are high usage of internet browsers and JS applications. PCs are quite ...
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3answers
373 views

How to read lm-sensors on AMD FX 6300?

My FX 6300 sits on a ASUS M5A99FX Pro R2.0 and is currently overclocked (I did the stresstesting and such on Windows to get it stable). Now I need the socket temp and the core temps so I use lm ...
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0answers
197 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)...
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1answer
50 views

HIgh cpu usage for Compiz process on ubuntu 14.04

I'm having very annoying issue: the compiz process eats up to 50-60% of the CPU resources on my dedicated server. I'm not really experienced with Ubuntu. I need to help to disable visual effects and ...
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0answers
25 views

Laptop error problem

My laptop Acer travelmate 7750Z, Ubuntu 14.04 Intel core B960 gives every few weeks an error during working. Screenshot: Do I need a new processor?
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3answers
828 views

High CPU Temperature after switch to Ubuntu 16.04

The idle CPU Temp of my Intel i5-3210M CPU was ~40°C on Ubuntu 14.04. Now, after upgrading to Ubuntu 16.04 (complete reinstall) it idles at ~52°C. Battery lifetime is also noticeably lower. What can ...
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0answers
39 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 ...
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1answer
119 views

Kswapd0 using 100% of CPU

I've got a mini server running (L)ubuntu 14.04.3, kernel 3.4.39. Every once in a while, the process kswapd0 will use 100% of my CPU power, even though I only use about ~20% of my RAM at that time. ...
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3answers
6k views

How do I analyze my CPU usage over a long period of time?

I am just wondering if there's any Ubuntu app that can track my CPU usage. The problem is that I am currently using a quad core i5, whilst what I do most in daily usage is just browsing and rails ...
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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 ...
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2answers
532 views

Incorrect CPU temperature reprted (AMD fx-6300

Psensor and hardware sensors indicator both report an incredibly low temperature on my AMD fx-6300 cpu, below 20 degrees celcius. Below is a screenshot of what it looks like within Psensor: I have ...
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8answers
29k views

Is it normal for compiz to consume 40% of my CPU with no other programs running?

When I have no other programs running, compiz takes up at least 40% of my CPU. Is this normal? If it is normal, is there anyway I could make this program take a smaller percentage?
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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 ...
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1answer
95 views

Why isn't Nvidia handling all graphics smoothly?

First post, but I've been lurking here for a while. I have been using Linux since Red Hat 7, I've recently upgraded to Ubuntu 16.04. It is my first Linux where the GPU is actually properly supported....
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2answers
11k 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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1answer
182 views

CPU frequency scaling stuck 2.80 Ghz and it's not going down

I'm using Ubuntu 16.04 LTS with gnome desktop. I set the governor to "ondemand", but the CPU still runs at top frequency. I tried many things, but it's stuck at 2.80 Ghz for hours. "scaling_max_freq" ...
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0answers
20 views

Ubuntu Touch number of CPU cores

I have the Meizu PRO 5 Ubuntu edition and it seems it is using 4 cores. (top, cpuinfo) This phablet is running on Samsung Exynos 7420 64-bit 14nm octa-core (A57+A53) CPU, so where are the missing ...
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4answers
92 views

Best desktop enviroment for old PC [duplicate]

I don't know if this is the right place to ask this question, there may also be duplicates, I just want to ask: Which will be the best DE for: Pentium 4 3.6 GHz (2007), 1GB DDR2 RAM, Intel 915G ...
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0answers
30 views

Wrong number of cpus in system monitor

I am running Ubuntu 16.04. I have two Intel Xeon E5-2683 V4 CPUs. Each CPU has 16 cores and 2 threads per core, but the system monitor only shows 58 processors. Why does the system monitor only show ...
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0answers
107 views

After Upgrade from Xubuntu 15.10 to Xubuntu 16.04 Acer Nitro VN7-792G Cpu running to hot

I recently upgraded to xubuntu 16.04 and have noticed the CPU temperature reaching between 55-85 C although the CPU load is the same as before I upgraded. This is about 10-15 C higher than before the ...
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0answers
13 views

I need to set apt-build mtune directive on VPS ubuntu server

I need to set the right architecture for apt-build to work, in a VPS environment. Here's cpu-info detailed: processor : 0 vendor_id : GenuineIntel cpu family : 6 model ...
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0answers
18 views

Understanding the reason behind a freeze using system logs to file bug

My Ubuntu laptop just froze a few minutes ago (like it is frequently doing) making me reboot it using the hardware forced way. I would like to know the cause behind it so that if necessary I can file ...
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1answer
66 views

Thinkpad W510 gets slow after 5 mins of regular activity (CPU thread fully loaded)

I own a Lenovo Thinkpad W510. Since I got it, I always run into this problem, especially when running Ubuntu. After starting the laptop and using Chrome or Firefox with just 4-5 tabs open and ...
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2answers
441 views

My laptop is seriously overheating

I installed Ubuntu 15.04 alongside Windows 7 on my laptop about an hour ago, and within two minutes of running Ubuntu (both during the Live CD and post-install), my CPU temperatures reach 100°C. In ...
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0answers
29 views

Have: HP ENVY Desktop - 750-167c - Updated to Ubuntu 16.4, Need HW support

Have: HP ENVY Desktop - 750-167c Updated to Ubuntu 16.4 Need HW support! I keep getting an "HP update drivers" box when I boot the system. I click "OK" and nothing happens other than the next time I ...