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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.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: impish
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https://bugs.launchpad.net/bugs/1947484
Title:
Ubuntu 21.10, 5.13.0-19. System freeze when power cable unplugged
Status in linux package in Ubuntu:
Incomplete
Bug description:
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.
When I switch kernels, the problem does not occur. The following
kernels do not freeze when I unplug the power cable.
* kernel 5.14.12 from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.12/
* kernel 5.13.19 from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.13.19/
When I boot back into the 5.13.0-19 kernel, the problem recurs.
I had also tried changing various system settings, bios settings, and
packages, none of which made any difference, aside from switching
kernels.
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