[SOLVED] One CPU pegged to 100% at idle

[agz]

Hello.

I have freshly installed Linux Mint and after doing some customization one of my CPUs is pegged to 100% at all times. I've gone through a few of the topics here and none of them addressed my problem.

The only customizations I've done relative to XFCE is I added a few separators and gadgets to the taskbar. Subsequently I removed them yet my CPU usage remains high. I also tried to disable the compositor to no effect. My laptop is getting hot enough to cause concern so I am hoping I find a resolution to this.

Along with the above I also had tried to run

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xfconf-query -c xfwm4 -p /general/vblank_mode -t string -s "xpresent" --create

Which did not fix the problem. My configuration:

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System:
  Host: laptop Kernel: 5.4.0-80-generic x86_64 bits: 64 Desktop: Xfce 4.16.0 
  Distro: Linux Mint 20.2 Uma 
Machine:
  Type: Laptop System: LENOVO product: 20HR006JUS v: ThinkPad X1 Carbon 5th 
  serial: 
  Mobo: LENOVO model: 20HR006JUS v: SDK0J40697 WIN serial:
  UEFI: LENOVO v: N1MET65W (1.50 ) date: 04/19/2021 
Graphics:
  Device-1: Intel HD Graphics 620 driver: i915 v: kernel 
  Display: server: X.Org 1.20.11 driver: modesetting unloaded: fbdev,vesa 
  resolution: 2560x1440~60Hz 
  OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.0.3 

Any ideas?

[SMG]

Which did not fix the problem. My configuration:

Welcome to the forum, agz.

I'm not sure why you did not supply the complete inxi output, but I believe the cpu on your computer is new enough that running an updated kernel may help.

Open Update Manager. Select View > Linux Kernels and click Continue. Make sure 5.11 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear. Install the kernel and then reboot for it to become active.

If that does not help, please supply the entire output of inxi -Fxxxrz as requested in Section 5 of READ: How To Get Help!.

[agz]

Which did not fix the problem. My configuration:

Welcome to the forum, agz.

I'm not sure why you did not supply the complete inxi output, but I believe the cpu on your computer is new enough that running an updated kernel may help.

Open Update Manager. Select View > Linux Kernels and click Continue. Make sure 5.11 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear. Install the kernel and then reboot for it to become active.

If that does not help, please supply the entire output of inxi -Fxxxrz as requested in Section 5 of READ: How To Get Help!.

Thanks for the reply!

Updated to 5.11:

Linux laptop 5.11.0-25-generic #27~20.04.1-Ubuntu SMP Tue Jul 13 17:41:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

CPU appears to still be pegged on boot.

Apologies for not reading the rules close enough. Here is the full output:

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System:
  Kernel: 5.11.0-25-generic x86_64 bits: 64 compiler: N/A 
  Desktop: Xfce 4.16.0 tk: Gtk 3.24.20 info: xfce4-panel wm: xfwm4 
  dm: LightDM 1.30.0 Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: LENOVO product: 20HR006JUS v: ThinkPad X1 Carbon 5th 
  serial: <filter> Chassis: type: 10 serial: <filter> 
  Mobo: LENOVO model: 20HR006JUS v: SDK0J40697 WIN serial: <filter> 
  UEFI: LENOVO v: N1MET65W (1.50 ) date: 04/19/2021 
Battery:
  ID-1: BAT0 charge: 35.7 Wh condition: 36.8/57.0 Wh (65%) volts: 12.8/11.6 
  model: LGC 01AV494 type: Li-poly serial: <filter> status: Unknown 
  cycles: 392 
CPU:
  Topology: Dual Core model: Intel Core i7-7600U bits: 64 type: MT MCP 
  arch: Amber Lake rev: 9 L2 cache: 4096 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 23199 
  Speed: 3500 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 3500 2: 3498 
  3: 3471 4: 3480 
Graphics:
  Device-1: Intel HD Graphics 620 vendor: Lenovo ThinkPad X1 Carbon 5th Gen 
  driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:5916 
  Display: x11 server: X.Org 1.20.11 driver: modesetting 
  unloaded: fbdev,vesa resolution: 2560x1440~60Hz 
  OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.0.3 
  direct render: Yes 
Audio:
  Device-1: Intel Sunrise Point-LP HD Audio 
  vendor: Lenovo ThinkPad X1 Carbon 5th Gen driver: snd_hda_intel v: kernel 
  bus ID: 00:1f.3 chip ID: 8086:9d71 
  Sound Server: ALSA v: k5.11.0-25-generic 
Network:
  Device-1: Intel Ethernet I219-LM vendor: Lenovo driver: e1000e v: kernel 
  port: efa0 bus ID: 00:1f.6 chip ID: 8086:15d7 
  IF: enp0s31f6 state: down mac: <filter> 
  Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: efa0 
  bus ID: 04:00.0 chip ID: 8086:24fd 
  IF: wlp4s0 state: up mac: <filter> 
Drives:
  Local Storage: total: 476.94 GiB used: 16.59 GiB (3.5%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: PM981 NVMe 512GB 
  size: 476.94 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: EXA72D1Q 
  scheme: GPT 
Partition:
  ID-1: / size: 466.30 GiB used: 8.14 GiB (1.7%) fs: ext4 dev: /dev/dm-1 
  ID-2: /boot size: 704.5 MiB used: 312.6 MiB (44.4%) fs: ext4 
  dev: /dev/nvme0n1p2 
  ID-3: swap-1 size: 980.0 MiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-2 
Sensors:
  System Temperatures: cpu: 75.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 6960 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com uma main upstream import backport
  2: deb https://la.mirrors.clouvider.net/ubuntu focal main restricted universe multiverse
  3: deb https://la.mirrors.clouvider.net/ubuntu focal-updates main restricted universe multiverse
  4: deb https://la.mirrors.clouvider.net/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/sublime-text.list 
  1: deb https://download.sublimetext.com/ apt/stable/
Info:
  Processes: 208 Uptime: 3m Memory: 15.39 GiB used: 1.09 GiB (7.1%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 
  clang: 10.0.0-4ubuntu1 Shell: bash v: 5.0.17 running in: xfce4-terminal 
  inxi: 3.0.38 

from running top it appears `kworker+` is doing the consumption? Second most consuming process is `ksoftir+`.

[SMG]

I have freshly installed Linux Mint and after doing some customization one of my CPUs is pegged to 100% at all times. I've gone through a few of the topics here and none of them addressed my problem.

The only customizations I've done relative to XFCE is I added a few separators and gadgets to the taskbar. Subsequently I removed them yet my CPU usage remains high. I also tried to disable the compositor to no effect. My laptop is getting hot enough to cause concern so I am hoping I find a resolution to this.

If you run a live session of Mint, is the cpu still being pegged? I wonder if something didn't remove completely when you removed what you added.

from running top it appears `kworker+` is doing the consumption? Second most consuming process is `ksoftir+`.

Here is some info on kworker [SOLVED] kworker CPU hogs. It is older info, but the general principle is that kworker is not the problem; something else is causing the issue. Seems checking dmesg or journalctl might help determine what is the issue.

ksoftir seems to be a similar situation in that it means other things are the real issue Why is ksoftirqd/0 process using all of my CPU?.

[all41]

Also try creating a new user using Users and Groups in your menu.
Then log out and log back in as the new user.
New users get a fresh set of non-molested config files.
Check your cpu usage there--this will be telling

[ricardogroetaers]

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CPU:
  Topology: Dual Core model: Intel Core i7-7600U bits: 64  L2 cache: 4096 KiB 
    Speed: 3500 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 3500 2: 3498  3: 3471  4: 3480 
Graphics:
  Device-1: Intel HD Graphics 620
  resolution: 2560x1440~60Hz

from running top it appears `kworker+` is doing the consumption? Second most consuming process is `ksoftir+`.

CPUs working "all steam".
Why?

Is there configuration in Setup? Example:
-Default CPU Speed
-Cpu Speed by Operating System

Integrated processor chart, there does not seem to be onboard video or separate video card.
High video resolution (2560x1440) but around half of the maximum processor capacity and common update frequency (60Hz).

Here, KWorker and Ksoftir processes do not consume CPU.
Kworker seems to be connected to APT's work as for Ksoftir, I did not find anything.

The command below can show the top 10 CPU consumers.
sudo inxi -tc10

[agz]

I have freshly installed Linux Mint and after doing some customization one of my CPUs is pegged to 100% at all times. I've gone through a few of the topics here and none of them addressed my problem.

The only customizations I've done relative to XFCE is I added a few separators and gadgets to the taskbar. Subsequently I removed them yet my CPU usage remains high. I also tried to disable the compositor to no effect. My laptop is getting hot enough to cause concern so I am hoping I find a resolution to this.

If you run a live session of Mint, is the cpu still being pegged? I wonder if something didn't remove completely when you removed what you added.

from running top it appears `kworker+` is doing the consumption? Second most consuming process is `ksoftir+`.

Here is some info on kworker [SOLVED] kworker CPU hogs. It is older info, but the general principle is that kworker is not the problem; something else is causing the issue. Seems checking dmesg or journalctl might help determine what is the issue.

ksoftir seems to be a similar situation in that it means other things are the real issue Why is ksoftirqd/0 process using all of my CPU?.

Indeed. and you wont believe the fix.

I started tracking dmesg and checking and it appears that Linux Mint will peg the CPU polling a USB port shut down for over current. I decided to blow compressed air into the port and magically my CPU returned to normal. Bought some USB covers but it seems stable.

I feel like an idiot...lol

[SMG]

I started tracking dmesg and checking and it appears that Linux Mint will peg the CPU polling a USB port shut down for over current. I decided to blow compressed air into the port and magically my CPU returned to normal. Bought some USB covers but it seems stable.

Good detective work!

If you consider the issue resolved, please go to your first post in this thread, click the pencil icon, and add [SOLVED] to the title so others know you are no longer seeking help on this issue. It also lets others know there is a solution in this thread. It's probably not one many would think of!

[motoryzen]

Indeed. and you wont believe the fix.

I started tracking dmesg and checking and it appears that Linux Mint will peg the CPU polling a USB port shut down for over current. I decided to blow compressed air into the port and magically my CPU returned to normal. Bought some USB covers but it seems stable.

I feel like an idiot...lol

0.o. That was an odd situation. That laptop, worst case, is around 3.5 years old. Unless you constantly only used it in a severely dirt/dusty environment every day for years on end...I don't understand how that could have been the problem. But regardless, happy to read you solved it.

[agz]

Indeed. and you wont believe the fix.

I started tracking dmesg and checking and it appears that Linux Mint will peg the CPU polling a USB port shut down for over current. I decided to blow compressed air into the port and magically my CPU returned to normal. Bought some USB covers but it seems stable.

I feel like an idiot...lol

0.o. That was an odd situation. That laptop, worst case, is around 3.5 years old. Unless you constantly only used it in a severely dirt/dusty environment every day for years on end...I don't understand how that could have been the problem. But regardless, happy to read you solved it.

Indeed. It probably was just a lucky particle. The port itself was not visibly dirty so I was concerned the connection was broken. As you've pointed out it's unlikely given the relative newness of the laptop. Might've been a rogue dog hair or something. Who knows. What a wild fix!