Thank you for taking the time to open this bug report. Did anything change in the last couple of days on your computer before this started happening? Did you install any new hardware, or update any packages/software?
Did you perhaps update the kernel in the last couple of days? If so, do you know the previous version you were running? Something has changed if this is only being hit now, and it might help tracking down the root cause if we know what has changed. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-6.8 in Ubuntu. https://bugs.launchpad.net/bugs/2076545 Title: kworker consumes 100% CPU and machine is unusable after an Ethernet link down/up event Status in linux-signed-hwe-6.8 package in Ubuntu: New Bug description: 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.8/+bug/2076545/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
