There it is! Thank you! It's a process owned by root called kworker/0:0+kacpid
. Any idea what that is?
[Edit 1] Interestingly, I can't even kill -9
it.
[Edit 2] With kworker kacpid
to work with, I did a quick search and found this SO page that has some interesting information that I only partially understand, but the following worked like a charm:
# grep -Ev "^[ ]*0" /sys/firmware/acpi/interrupts/gpe?? | sort --field-separator=: --key=2 --numeric --reverse | head -1
/sys/firmware/acpi/interrupts/gpe09:11131050 STS enabled unmasked
# echo disable > /sys/firmware/acpi/interrupts/gpe09
It's not clear to me what an interrupt is or whether this gpe09
value is meant to be persistent across reboots, or why this only seems to be happening in the last couple months, but if I can make it go away by running the above from time to time, I guess it's alright?
Seven Raspberry Pi 4's and one Pi Zero, mounted on some tile "shelves" inside some IKEA furniture.