Arch Linux

yannickp

Member

Registered: 2009-06-18

Posts: 14

Website

High CPU Usage IRQ 86 on Thinkpad L14 Gen 2 AMD Ryzen

I'm running Archlinux on a Thinkpad L14 Gen 2 AMD Ryzen 7 PRO 5850U
And facing a high CPU usage on an IRQ

Top is showing this:

426 root     -51   0       0      0      0 R  78.8   0.0   0:20.95 irq/86-ACPI:Eve

cat /proc/interrupts

 86:          0    1004591          0          0          0          0          0          0          0          0          0          0          0          0          0          0  amd_gpio   18  ACPI:Event

This high CPU usage disappear after some time when I connect the laptop to a docking station, but stays very high when I run on the battery.

Any idea how to solve this ?

yannickp

Member

Registered: 2009-06-18

Posts: 14

Website

Re: High CPU Usage IRQ 86 on Thinkpad L14 Gen 2 AMD Ryzen

/sys/firmware/acpi/interrupts/sci_not counter is continuously increasing

grep . -r /sys/firmware/acpi/interrupts                                                                                                                                                             ✔
/sys/firmware/acpi/interrupts/gpe1F:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe13:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0F:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe03:     214  EN     enabled      unmasked
/sys/firmware/acpi/interrupts/gpe1D:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/ff_pwr_btn:       0  EN     enabled      unmasked
/sys/firmware/acpi/interrupts/gpe11:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0D:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe01:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/ff_rt_clk:       0         disabled     unmasked
/sys/firmware/acpi/interrupts/ff_pmtimer:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe1B:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0B:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe18:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe08:       0  EN     enabled      unmasked
/sys/firmware/acpi/interrupts/error:       0
/sys/firmware/acpi/interrupts/gpe16:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/sci:     214
/sys/firmware/acpi/interrupts/gpe06:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe14:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe04:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe1E:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe12:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0E:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe02:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe1C:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe10:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0C:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe00:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe_all:     214
/sys/firmware/acpi/interrupts/gpe19:       0         disabled     unmasked
/sys/firmware/acpi/interrupts/gpe1A:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe09:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe0A:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe17:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/ff_gbl_lock:       0  EN     enabled      unmasked
/sys/firmware/acpi/interrupts/gpe07:       0  EN     enabled      unmasked
/sys/firmware/acpi/interrupts/sci_not: 3373399
/sys/firmware/acpi/interrupts/gpe15:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/gpe05:       0         invalid      unmasked
/sys/firmware/acpi/interrupts/ff_slp_btn:       0         invalid      unmasked

Benas09

Member

Registered: 2021-08-11

Posts: 3

Re: High CPU Usage IRQ 86 on Thinkpad L14 Gen 2 AMD Ryzen

I have same laptop with I think similar issue. 34-ACPI:Eve almost constantly consumes a lot of cpu. If you will find out something, please let me know.

Edit

Looks like, that this helped for me:

sudo nano /etc/default/grub

replace

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=noirq"

sudo update-grub
sudo reboot

Last edited by Benas09 (2021-08-12 08:12:29)

audiores

Member

Registered: 2021-09-06

Posts: 9

Re: High CPU Usage IRQ 86 on Thinkpad L14 Gen 2 AMD Ryzen

There is a longer thread on reddit which collected together all the current Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities: https://www.reddit.com/r/AMDLaptops/com … amd_linux/. There also the IRQ problem is mentioned, but there IRQ88 as well as IRQ86 are mentioned.

audiores

Member

Registered: 2021-09-06

Posts: 9

Re: High CPU Usage IRQ 86 on Thinkpad L14 Gen 2 AMD Ryzen

The issues seem to be evident for Lenovo, and according to this thread on the Lenovo Forums https://forums.lenovo.com/t5/Fedora/L15 … 248?page=1, Lenovo is working on a BIOS update for the L15.

There are some recent news and patches to the Linux Kernel for s3idle and s0idle 5.14 and 5.15 https://www.reddit.com/r/linuxquestions … 3idle_and/, but there also seems to be no fix yet.