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My laptop heats rapidly when connected to power, which might not be the most surprising, but I have noticed an irq/9-acpi process eating up to 50% of one of the cores time. It only happens when I plug in the power (any usb-c port).

I have read this has to do with some interruptions, but I am not fully knowledgable and I am not sure where could I look for more information on how to solve it.

I have LG Gram 14Z90Q laptop.

Here's a fragment of /var/log/kern.log file:

2025-01-30T21:20:03.587842+01:00 kornel-LG kernel: workqueue: ucsi_handle_connector_change [typec_ucsi] hogged CPU for >10000us 4 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:07.221756+01:00 kornel-LG kernel: workqueue: acpi_os_execute_deferred hogged CPU for >10000us 64 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:08.863842+01:00 kornel-LG kernel: workqueue: acpi_ec_event_processor hogged CPU for >10000us 64 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:10.320730+01:00 kornel-LG kernel: workqueue: ucsi_handle_connector_change [typec_ucsi] hogged CPU for >10000us 8 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:19.369819+01:00 kornel-LG kernel: workqueue: acpi_os_execute_deferred hogged CPU for >10000us 128 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:20.270778+01:00 kornel-LG kernel: workqueue: ucsi_handle_connector_change [typec_ucsi] hogged CPU for >10000us 16 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:24.776829+01:00 kornel-LG kernel: workqueue: acpi_ec_event_processor hogged CPU for >10000us 128 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:35.016749+01:00 kornel-LG kernel: workqueue: ucsi_handle_connector_change [typec_ucsi] hogged CPU for >10000us 32 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:40.037833+01:00 kornel-LG kernel: workqueue: acpi_os_execute_deferred hogged CPU for >10000us 256 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:50.214726+01:00 kornel-LG kernel: workqueue: acpi_ec_event_processor hogged CPU for >10000us 256 times, consider switching to WQ_UNBOUND
2025-01-30T21:20:51.770768+01:00 kornel-LG kernel: ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-70)

Thanks

LG Gram 14Z90Q laptop
6.8.0-52-generic
Ubuntu 24.04.1 LTS
magladko
  • 33

1 Answers1

0

Try:

sudo echo "disable" > /sys/firmware/acpi/interrupts/gpe16

(Based on: https://www.reddit.com/r/archlinux/comments/5ji6f7/auto_disabling_acpi_interrupts/ and: Why does kworker cpu usage get so high? and: https://blog.hqcodeshop.fi/archives/2019/08/18.html (which points to, (among others): https://perf.wiki.kernel.org/)

(This worked, even though it says gpe16 and not 9)

(Running an HP Laptop 15-da1xxx, processor: Intel Core i7-8565U)

Helen Craigman
  • 241