When I unplug the network cable from my machine or turn off the device in front of it (a UDP acquisition card), my machine freezes… I then observe in ‘top’ a process of the type kworker/0:x that consumes 100% of the CPU. Very quickly, my machine becomes uncontrollable (no more keyboard, no more mouse, frozen display), and I have only one solution: a HARD reboot, restarting by holding down the power button for several seconds.
I tried with other devices and it seems to do the same… as if I couldn’t hotplug a network device.
It’s extremely disabling, and I don’t know what I can do…
I have the same problem with Fedora 39 on a Thinkpad T450s and T470s. I have reported this against kernel but not gotten any attention so far. May have to reassign the bug report to iwlwifi or so.
I experience the issue when I undock my Thinkpads from the docking station because that unplugs ethernet and I am expecting a switch over to wifi. I think I started observing this behavior around 3 to 4 months ago.
I’ll look for my bug report later and will link it here.
While this is workaround, it can’t be the solution. If it works with an older kernel but not with recent kernels, then this is a regression that needs to be documented, reported and fixed. Help us collect logs and report it on the bugtracker.
Yes, I totally agree with you…
What should I do to provide more relevant and accurate logs ? journalctl, dmesg… ? Also I need to make sure I can find them after a hard reboot so I can post them here…
thank you for your help.
Logs should be edited to remove extraneous detail, then posted as pre-formatted text using the </> button from the top line of the text entry box.
Journalctl captures enormous detail, so it is important to use the filter options to eliminate irrelevant entries. It can also generate very long lines. Once you have a good set of filter options, pipe the output to cat to get complete (wrapped) lines for forum posts. For your issue, I would start with journalctl -b -1 --no-hostname -g e1000e -g BUG | cat.
