In my case,
# echo 'on' > '/sys/bus/usb/devices/usb3/power/control'
helps removing the high CPU usage of kworker and ksoftirqd.
My PC (Ubuntu 22.04, 6.5.0-1020-oem) has a broken USB port on usb3 and dmesg
reports "usb usb3-port7: over-current condition".
Also, powertop is enabled on my PC and
I would like to know if anyone found a solution for lg gram systems.
Currently i am using HW and os see below. kernel is from mainline
archive
Operating System: Linux Mint 21.3
Kernel: Linux 5.19.17-051917-generic
Architecture: x86-64
Hardware Vendor: LG
Hello! Any news about this issue? I have the same problem on a freshly
installed kubuntu 22.04.3 LTS on a ASUS laptop with AMD Ryzen 9 7845HX
and RTX 4060 GPU. Disabling the module xhci_pci works, but unfortunately
in my case when I do this the keyboard becomes completely inactive. Is
there a way
So, I have 2 systems with kubuntu 22.04.3, a desktop and a laptop. The
desktop has a 5.15 kernel, even though I always install all available
updates, but the laptop has a 6.2 kernel. I'd be happy to "downgrade"
that kernel to see what would happen with the rogue runaway kthreads. Is
that possible?
The situation has gotten much worse with the 6.2.0.33 kernel! There are
now kworker threads spinning out of control even without an SD drive in
the slot. Inserting an SD drive just adds new kworker threads! Testing
anyone? How can things deteriorate so badly?
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I should have added that this bug also causes the system to overheat
badly even in sleep mode. It seems it causes the system to wake up. I
got in the habit of powering it off when traveling because I found it
almost too hot to touch a couple of times when I took it out of my
backpack.
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This issue is only present for me when a micro-SD card is plugged in,
whether it is mounted or not. System is LG-Gram, running fully up to
date 22.04.3, running 5.15.0-83-generic kernel as of today. Completely
reproducible.
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Please boot mainline kernel [0] with kernel parameter "usbcore.dyndbg
xhci_pci.dyndbg log_buf_len=16M" and attach dmesg here.
[0] https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.2/amd64/
** Changed in: linux (Ubuntu)
Status: Expired => Confirmed
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Expired? The bug is real. Experiencing it right now.
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1990876
Title:
kworker high CPU usage: issue with xhci_hub_control from xhci_pci
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Same issue if, instead of the camera, I plug the USB-C ethernet adapter:
kworker at over 90% usage. Same "solution".
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Title:
Today I tried out an experiment:
$ sudo modprobe xhci_pci
(wasn't loaded before)
... and the kworker wasn't active. Hurray! But: then I opened "Cheese"
to test out the webcam. The webcam works, Cheese was using ~50% CPU just
to show me my own image (doesn't sound right), and when I closed
Error still here, with: 5.15.0-56-generic #62-Ubuntu SMP Tue Nov 22
19:54:14 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
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Title:
Today this bug returned, perhaps because I plugged in a USB-A mouse, or
the ethernet USC-C expansion card.
As usual, this made the kworker at 90% CPU go away:
```$ sudo modprobe -r xhci_pci```
... but now the USB ports don't work, of course.
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Spoke too early: today, for some reason, this bug returned. Perhaps
because I plugged in a mouse, or the ethernet expansion card.
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The problem seems to have, finally, gone with linux-image-5.15.0.53:
5.15.0-53-generic #59-Ubuntu SMP Mon Oct 17 18:53:30 UTC 2022 x86_64
x86_64 x86_64 GNU/Linux
This bug report can now be closed.
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Same problem with linux.image-5.10.0.52.
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Title:
kworker high CPU usage: issue with xhci_hub_control from xhci_pci
kernel module
I have tried `sudo apt install linux-oem-22.04a` to install linux-
image-5.17.0-1018-oem and the same problem occurs: `top` lists two, not
one, kworker processes running hot continuously.
And with linux-image-5.10.0-50-generic (released today for Ubuntu
22.04a), same problem.
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I have tried `sudo apt install linux-oem-22.04a` to install linux-
image-5.17.0-1018-oem and the same problem occurs: `top` lists two, not
one, kworker processes running hot continuously.
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Thanks Kai-Heng Feng, I have just tried to use 5.15.0.43-generic and the
issue isn't there: no need to modprobe -r xhci_pci, as there isn't any
kworker pegging a CPU.
So indeed a git bisect or similar approach between kernels .43 and .46
could reveal something. I can't find binaries for kernels
Can you please try some older kernel before 5.15.0-46-generic?
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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