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High CPU from kworker/0:x-kacpi_notify | |
Ubuntu 20.04 LTS | |
Update: this problem is fixed after I did "apt dist-upgrade" on 9/21/2020 | |
Update again: Acutally not fixed. It happened again after unplug/plug the usb-c hub. | |
I recently got a USB-C Hub (Targus ACA958USZ). When it's plugged in, the laptop gives high cpu from process | |
I've found a few USB-C hubs from various manufactures with the same problem. I think they are of the same chipset. | |
1071993 root 20 0 0 0 0 I 11.6 0.0 0:10.20 kworker/0:2-kacpi_notify | |
Reference: | |
https://superuser.com/questions/1477106/acpi-interrupts-causes-high-cpu-usage-from-kworker | |
$ grep . -r /sys/firmware/acpi/interrupts | grep -v " 0" | |
/sys/firmware/acpi/interrupts/sci:30750706 | |
/sys/firmware/acpi/interrupts/gpe6E: 89394 EN enabled unmasked | |
/sys/firmware/acpi/interrupts/gpe69:30662925 EN STS enabled unmasked | |
/sys/firmware/acpi/interrupts/gpe30: 32 EN enabled unmasked | |
/sys/firmware/acpi/interrupts/gpe_all:30752375 | |
/sys/firmware/acpi/interrupts/sci_not: 12 | |
/sys/firmware/acpi/interrupts/gpe6F: 1 EN enabled unmasked | |
/sys/firmware/acpi/interrupts/gpe6D: 5 EN enabled unmasked | |
/sys/firmware/acpi/interrupts/gpe61: 17 EN enabled unmasked | |
Need disable interrupt gpe69 | |
Run as root: | |
$ echo "disable" > /sys/firmware/acpi/interrupts/gpe69 |
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echo "disable" > /sys/firmware/acpi/interrupts/gpe69 worked like a charm. I'm on Ubuntu 23.04