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

From	ben.75@bmg7.com
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU.
Date	2026-03-03 03:50 +0100
Message-ID	<MunZD-4AVZ-3@gated-at.bofh.it> (permalink)
References	<LTX61-eUYQ-1@gated-at.bofh.it> <Mtuqu-3YuU-7@gated-at.bofh.it> <Mu7rP-4q7G-3@gated-at.bofh.it> <LTX61-eUYQ-1@gated-at.bofh.it> <Mu7rP-4q7G-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Hi,

Will open a bug report with nouveau to see if they can help me 
troubleshoot this more.

Best regards

Benjamin

On 3/2/26 02:57, Uwe Kleine-König wrote:
> Hello Ben,
>
> On Sat, Feb 28, 2026 at 09:20:57AM -0600, ben.75@bmg7.com wrote:
>> I have been trying several different configurations and they all have there
>> own set of problems.
>>
>> Nvidia  + wayland = Several apps act weird, Spectacle breaks depending on
>> which app is open.
>>
>> Nvidia + X11 = works good except for when waking the screens from sleep. I
>> get a black screen with mouse cursor. I can see when move over the password
>> box because the cursor changes, I can type in the password and usually
>> login. Sometimes it does lock up and I have to do hard reboot. This is a
>> Kwin + X11 problem but from what I read its not going to be fixed since they
>> are only focusing on Wayland.
> The Nvidia parts above only prove that your hardware is probably ok. As
> the driver is closed source, there isn't much more we can learn or do
> about it.
>
>> Nouveau + Wayland = same as original problem
> original problem = kworker threads using CPU? That's nothing I can act
> upon---as describe in my earlier mail.
>   
>> I did update the firmware from the back-ports and it fixed the missing
>> firmware errors listed earlier, but I still get this "kernel: nouveau
>> 0000:01:00.0: drm: Disabling PCI power management to avoid bug"
> The bug mentioned here is described in more detail at
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/nouveau/nouveau_drm.c?id=11439c4635edd669ae435eec308f4ab8a0804808#n800
>
> With the nvidia driver that's maybe the issue that you describe above
> where on returning from sleep you get black screens. So you have 3
> options to go on:
>
>   - Stay on nouveau and live with PCI power management being disabled
>   - Stay on nvidia (or patch nouveau to enable PM) and live with the
>     black screens on resume
>   - Work on the problem and find a better solution
>
> For the 3rd option it's most probably you who would have to do the work.
> Maybe upstream is interested and could help you, the Debian kernel team
> cannot. Please contact upstream directly then.
>
> Best regards
> Uwe

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Thread

Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. ben.75@bmg7.com - 2026-02-28 16:30 +0100
  Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. Uwe Kleine-König <ukleinek@debian.org> - 2026-03-02 10:10 +0100
    Bug#1121192: kworker: Events_unbound, kworker processes, continually using CPU. ben.75@bmg7.com - 2026-03-03 03:50 +0100

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