Ubuntu 21.10, 5.13.0-19. System freeze when power cable unplugged

[xiota]

I'm using KDE Plasma on Ubuntu 21.10 with kernel 5.13.0-19. Recently, my laptop has been freezing upon unplugging the power cord. The sysrq keys do not work when this occurs.

Previously, the problem appeared to resolve when switching kernels. However, when I tried to obtain logs, the problem began to occur on all installed kernels (5.14.12, 5.13.19, and 5.13.18 from https://kernel.ubuntu.com/~kernel-ppa/mainline/).

Logs cannot be obtained because none appear to be saved to disk during the crash. (journalctl -k -b -1)

Since the problem appears kernel related, I tried removing potentially problematic kernel options from /etc/default/grub. After removing all acpi and i915 options (which I had enabled because they had previously been needed to make the backlight work and reduce gpu crashes), the problem again *appears* to have resolved with all of the aforementioned kernels.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1947484

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[XxEarthxX (budwiser)]

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[XxEarthxX (budwiser)]

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[XxEarthxX (budwiser)]

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