why am i getting ' event processing lagging behind' msg in Ubuntu 20.10

Question

seeing my system logs, they are full of msgs like this:

/usr/libexec/gdm-x-session[2564]: (EE) event4  - SIGMACHIP USB Keyboard: client bug: event processing lagging behind by 25ms, your system is too slow
/usr/libexec/gdm-x-session[2564]: (EE) event4  - SIGMACHIP USB Keyboard: client bug: event processing lagging behind by 17ms, your system is too slow

i have a 12 core system which is essentially idle when i see this. it seems to happen since i upgraded to Ubuntu 20.10.

how can i find the root cause and how to eliminate this issue?

sys info:

model name  : AMD Ryzen 9 3900X 12-Core Processor
/sys/devices/system/cpu/cpufreq/policy10/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpufreq/policy0/scaling_governor:ondemand

grep . /sys/devices/system/cpu/cpuidle/*
/sys/devices/system/cpu/cpuidle/available_governors:ladder menu teo 
/sys/devices/system/cpu/cpuidle/current_driver:acpi_idle
/sys/devices/system/cpu/cpuidle/current_governor:menu
/sys/devices/system/cpu/cpuidle/current_governor_ro:menu

Solution

That error message is not from the kernel, and is somewhat misleading. It isn't even really an error, more a warning. Some think that it should say:

your compositor is too slow

instead of

your system is too slow

Ignore it.

References:
https://forums.gentoo.org/viewtopic-t-1117556-start-0.html
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968093

Comments

[Doug Smythies]

Please edit your question adding: Processor make and model; CPU frequency scaling driver and governor; Idle governor. Do: grep "model name" /proc/cpuinfo; grep . /sys/devices/system/cpu/cpufreq/policy*/scaling_driver; grep . /sys/devices/system/cpu/cpufreq/policy*/scaling_governor; grep . /sys/devices/system/cpu/cpuidle/*.

[pdeva]

ok, i added what you asked

[ACV]

It might have to do with this, although I am not sure: wiki.archlinux.org/index.php/Power_management#USB_autosuspen‌​d

[Pavel Šimerda]

I'm actually getting the same thing on a Lenovo desktop with i7-8700 with sway & wayland. But they some wayland windows (alacritty) stop working. Actually the whole thing stops working but killing swayidle from another VT and running swaymsg reload in a new terminal kills the old windows.

[Yaroslav Nikitenko]

I have an Intel (integrated) graphics card on my laptop, and I've plenty of such messages. I think my drivers are pretty recent, because it's Arch Linux (rolling release).

[Nephilim]

I cannot ignore it, my keybinds are not being recognized correctly. It is very frustrating. Super + A hotkey is registered as just A.

[Pavel Šimerda]

@YaroslavNikitenko Same here, i7-8700, always latest Tumbleweed.