Public bug reported:
I have got a somewhat unstable internet connection since years. So far
it didn't caused extra problems, but since 1-2 days (I cannot tell
exactly) I have a strange and annoying experience. I can even simulate
this 100% by unplugging the ethernet cable and then plugging it back. At
the time of the 'link up' event after the link down, kworker (I assume
this is a kernel thread) starts to consume 100% of CPU, and the machine
goes so slow, that I cannot even start a program, even opening a new
terminal takes minutes. Only reboot helps (even the reboot is
problematic, I need to use sysreq keys to it "by force"), the fan of the
computer starts to spin wildly. Meanwhile in kernel log:
Aug 11 14:40:04 rygel kernel: [19512.079303] e1000e 0000:00:1f.6 enp0s31f6: NIC
Link is Down
Aug 11 14:40:31 rygel kernel: [19538.944490] workqueue: pm_runtime_work hogged
CPU for >13333us 4 times, consider switching to WQ_UNBOUND
Aug 11 14:40:48 rygel kernel: [19556.627377] e1000e 0000:00:1f.6 enp0s31f6: NIC
Link is Up 10 Mbps Half Duplex, Flow Control: Rx/Tx
Aug 11 14:40:48 rygel kernel: [19556.627408] BUG: scheduling while atomic:
kworker/11:1/10842/0x00000002
Another event like this:
[ 352.735369] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[ 370.173051] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 10 Mbps Half
Duplex, Flow Control: Rx/Tx
[ 370.173085] BUG: scheduling while atomic: kworker/11:1/191/0x00000002
Machine: Dell Inc. Latitude 5531/0FRYDD, BIOS 1.6.0 07/07/2022
Distribution: Ubuntu 22.04.4 LTS (64 bit x86)
Kernel: Linux rygel 6.8.0-39-generic #39~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed
Jul 10 15:35:09 UTC 2 x86_64 x86_64 x86_64 GNU/Linu
Network connection: wired ethernet (I don't use wifi), PCI info: 00:1f.6
Ethernet controller: Intel Corporation Ethernet Connection (16) I219-LM (rev 01)
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.8.0-39-generic 6.8.0-39.39~22.04.1
ProcVersionSignature: Ubuntu 6.8.0-39.39~22.04.1-generic 6.8.8
Uname: Linux 6.8.0-39-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.6
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 11 15:02:52 2024
InstallationDate: Installed on 2022-09-23 (688 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64
(20220809.1)
SourcePackage: linux-signed-hwe-6.8
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe-6.8 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy wayland-session
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https://bugs.launchpad.net/bugs/2076545
Title:
kworker consumes 100% and notebook unusable after an ethernet link
down and link up event
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