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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'.
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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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