Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.kernel > #91105 > unrolled thread

Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU.

Back to article view | Back to linux.debian.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. Benjamin Martin <ben.75@bmg7.com> - 2026-02-07 17:20 +0100
    Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. Ben Hutchings <ben@decadent.org.uk> - 2026-02-08 19:30 +0100
      Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. Benjamin Martin <benjamin@bmg7.com> - 2026-02-09 14:00 +0100

#91105 — Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU.

Package: linux-image-6.16.3+deb13-amd64-unsigned
Followup-For: Bug #1121192
X-Debbugs-Cc: ben.75@bmg7.com

Answer is yes to both of your questions.

It is kinda hard to explain but mainly I will be working on my computer when I
notice that the average frequency will be pegged at the top (4.4ghz in my
case), If I open system monitor I will see these 3 processes at the top of the
list. This may last for a few minutes and then my computer will go back to
idle.

Also when using browsers, both Brave and Firefox, depending on the website I
will notice high CPU usage, such as scrolling through facebook but not limited
to that website.

I installed the nivida drivers and this took care of the problem in the
browsers at least. I didn't use it long with the Nivida drivers because it
causes other problems that are much worse. Basically If I wake the screens from
the off state, I get a black screen with a mouse but no picture. I can move my
mouse over the password box and type it in blind, hit enter and wait. Sometimes
it will load the desktop, but more often than not I needed to reboot to get to
the desktop. ( I think this is a KDE problem. )

I am currently on the 6.17 Kernel from backports, but this did not help any of
this.


Regards,
Benjamin


-- System Information:
Debian Release: 13.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.17.13+deb13-amd64 (SMP w/6 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

[toc] | [next] | [standalone]

#91111

[Multipart message — attachments visible in raw view] — view raw

On Sat, 2026-02-07 at 10:14 -0600, Benjamin Martin wrote:
> Package: linux-image-6.16.3+deb13-amd64-unsigned
> Followup-For: Bug #1121192
> X-Debbugs-Cc: ben.75@bmg7.com
> 
> Answer is yes to both of your questions.
> 
> It is kinda hard to explain but mainly I will be working on my computer when I
> notice that the average frequency will be pegged at the top (4.4ghz in my
> case),

CPU power saving depends on both frequency and idle states (where much
of the CPU is stopped entirely).  On x86 CPUs it's often better to run
at high frequency for short periods and spend more time in idle state.

Most tools showing you the average frequency don't take into account the
time spent in idle state where the frequency is effectively 0.

Have you measured actual power usage and compared the old and new kernel
versions?

> If I open system monitor I will see these 3 processes at the top of the
> list. This may last for a few minutes and then my computer will go back to
> idle.

Again you have looked at some numbers and decided they are bad, but what
is the real problem?

> Also when using browsers, both Brave and Firefox, depending on the website I
> will notice high CPU usage, such as scrolling through facebook but not limited
> to that website.
[...]

Yes, modern web sites are very resource-intensive, but what makes this a
Debian bug?

Ben.

-- 
Ben Hutchings
This sentence contradicts itself - no actually it doesn't.

[toc] | [prev] | [next] | [standalone]

#91117

Because something is not normal.

Let me do some more testing. I am going to install Debian 13.0 on a 
different disk.


Regards,

Benjamin


On 2/8/26 12:21, Ben Hutchings wrote:
> On Sat, 2026-02-07 at 10:14 -0600, Benjamin Martin wrote:
>> Package: linux-image-6.16.3+deb13-amd64-unsigned
>> Followup-For: Bug #1121192
>> X-Debbugs-Cc: ben.75@bmg7.com
>>
>> Answer is yes to both of your questions.
>>
>> It is kinda hard to explain but mainly I will be working on my computer when I
>> notice that the average frequency will be pegged at the top (4.4ghz in my
>> case),
> CPU power saving depends on both frequency and idle states (where much
> of the CPU is stopped entirely).  On x86 CPUs it's often better to run
> at high frequency for short periods and spend more time in idle state.
>
> Most tools showing you the average frequency don't take into account the
> time spent in idle state where the frequency is effectively 0.
>
> Have you measured actual power usage and compared the old and new kernel
> versions?
>
>> If I open system monitor I will see these 3 processes at the top of the
>> list. This may last for a few minutes and then my computer will go back to
>> idle.
> Again you have looked at some numbers and decided they are bad, but what
> is the real problem?
>
>> Also when using browsers, both Brave and Firefox, depending on the website I
>> will notice high CPU usage, such as scrolling through facebook but not limited
>> to that website.
> [...]
>
> Yes, modern web sites are very resource-intensive, but what makes this a
> Debian bug?
>
> Ben.
>

[toc] | [prev] | [standalone]

Back to top | Article view | linux.debian.kernel

csiph-web