Whenever kidle_inject starts running on my system the load shoots up. In general it only gets to a load of around this 5.23, 3.65, 2.54 but a lot of the time it jumps up past the 15 mark on each of them. At that point the system grinds to a halt and I have to power it off.

This only happens when the kidle_inject process starts. How can I disable this process so my machine can work and I can get some work done.

Example top:

top - 12:43:48 up  3:02,  3 users,  load average: 6.57, 5.53, 3.33
Tasks: 256 total,   3 running, 253 sleeping,   0 stopped,   0 zombie
%Cpu(s):  5.9 us, 16.6 sy,  0.0 ni, 74.7 id,  0.5 wa,  0.0 hi,  2.3 si,  0.0 st
KiB Mem:   8080252 total,  7937856 used,   142396 free,   258904 buffers
KiB Swap:        0 total,        0 used,        0 free.  4061336 cached Mem

13509 root     -51   0       0      0      0 S  54.7  0.0   3:29.47 kidle_inject/1
13511 root     -51   0       0      0      0 S  54.1  0.0   3:30.92 kidle_inject/3
13510 root     -51   0       0      0      0 S  48.8  0.0   3:11.60 kidle_inject/2
13508 root     -51   0       0      0      0 S  47.6  0.0   3:08.47 kidle_inject/0

It appears that this is a bug in the kernel.

From the comments on that bug report, running the command sudo rmmod intel_powerclamp seems to have stopped the kidle_inject processes and I haven't noticed any issues with doing so as of yet.

Hopefully this will be fixed soon. If I do notice anything I will update this answer.


The rmmod command needs to be run every time you boot the machine. I have not noticed anything bad happening since running this command.

Update 2

I have noticed since doing this that my CPU temp now tends to run much lower at around the ~72°

For making this set while booting use a command

echo "blacklist intel_powerclamp" > /etc/modprobe.d/disable-powerclamp.conf
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    You don't have to run that command every time you boot. You can just blacklist it with echo "blacklist intel_powerclamp" > /etc/modprobe.d/disable-powerclamp.conf – Jesse Mar 15 '15 at 23:06
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    Hopefully this will be fixed soon Yeah, hopefully... come on, it's 2016, I think we're on kernel version 87 now? can we please move past the "haha lets overheat the computer for shits and giggles" thing? – cat May 4 '16 at 23:34
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    This is not actually a bug, but a feature to prevent the processor from further overheating. I'd also suggest reading this. – user364819 Nov 20 '16 at 18:02
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    Instant improvement for me, Thank You. Running Kubuntu 18.04 on a clevo laptop. kernel 4.15.0-20. – kshepherd May 4 '18 at 14:35
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    @user364819 "believe to have been fixed in later versions of Ubuntu" Uh, no, think again. I'm running Ubuntu 18.04 on a new clevo laptop, in a somewhat frigid environment. This kicks in with 8 instances (best I can tell, one for each core) while the chip is barely warm (not even 35C; my own brain's running hotter without trouble). Granted, has been a few years, but last processor I knew the spec on, 100C wasn't even redline. – Matthew Najmon Jan 27 '19 at 14:26

The accepted answer is incomplete. According to the bug comments, the kidle_inject processes are spawned to throttle processor and protect it from further overheating.

Before "fixing" the bug, make sure your fan is clean and works correctly. I had this problem and found out that the vent was full of dust. After cleaning and reboot no kidle_inject was spawned anymore.

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  • Thank you for adding this note. I will also note that this was happening to my machine which was brand new. I have since setup debian on it and have had no issues and no need to apply this temporary fix. – Nalum Jun 16 '16 at 12:55
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    the expected aim of that process may very well be to protect the cpu from overheating, but how can it do that while taking 50% or more of the cpu load? that's the bug. I had to stop that process too, and replaced it when necessary with a cpu-throttle script – user47206 Apr 3 '17 at 17:45
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    Good point, you're right that it doesn't directly protect the CPU. Maybe it will raise the user's attention though, since he will find that the computer is unusable and will do something about it. It would indeed be a better solution to underclock the CPU and notify user about its high temperatures. – johnny Dec 15 '17 at 18:13
  • I'm having this issue when the chip is downright cold. Clean fan (brand-new fan), frigid operating environment (have been concerned I might need to insulate it to protect other components, like the battery, but so far, system's not dropped cold enough to need it), and the system is still cripplingly slow, with these running on it. – Matthew Najmon Jan 27 '19 at 14:30

If you are running a macbook, make sure that you have macfanctld installed. If you don't, the fan will be fixed at around 2000 RPM out of the max 6000. This can be seen by the sensors command. In this situation powerclamp will kick in to save the CPUs rather early.

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    I would argue that the answer is not complete without this being included. – theYnot Jun 6 '17 at 10:16

I noticed this today as well. Oddly enough for the kind of CPU usage, the fan wasn't making any noise. Managed to reboot the machine and then looked at BIOS Fan speed. It showed that the fan had stopped (no RPM reading). So after a bit of a cleaning (quite literally - opening the laptop lid, cleaning a bit, the fan started working fine and things got alright. So might be the problem is with your CPU fan. So simply disabling the intel_powerclamp may not be a good idea.

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I did the following steps which worked.

  1. Check if the module is loaded.

    lsmod |grep -i intel_powerclamp
  2. If the previous command shows that the module is loaded, perform the next lines.

  3. Add the following line in your crontab rules @reboot /sbin/rmmod intel_powerclamp or echo '/sbin/rmmod intel_powerclamp' >> /etc/bash.bashrc (it will affect all users) or echo 'blacklist intel_powerclamp' > /etc/modprobe.d/disable_mods.conf.

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A good cleaning around the laptop (HP EliteBook 8460p running Ubuntu 16.04 LTS) and a vacuuming of the air vents on both sides (along with moving the piles of random stuff that had accumulated there) fixed it for me.

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