Arch Linux

deathangle908

Member

From: Ukraine

Registered: 2013-10-16

Posts: 52

Website

[SOLVED] udev consuming 100% cpu, unable to kill

My system is pretty unstable atm, I'm using new hardware z690 chipset with 12900k i9 cpu. Integrated graphic just hangs and discrete one (gtx 1080 only) works. With that being said I have udev using 100% of my cpu (eating a single core). Following this stackoverflow thread I tried to :

• edit /lib/udev/rules.d/69-libmtp.rules

• udevadm monitor shows nothing

• I'm unable to stop the process that eats 100% cpu. Even If I kill parent udev I still have 1 child process being a zombie.

My hardware is:

• Asus z690p motherboard

• gtx 1080

• i9 12900k

• 6 monitors attached to both integrated (CPU) and discrete graphic cards

My software is:

• Archlinux everything up to date

• kernel local/linux 5.15.10.arch1-1

• local/systemd 249.7-2

If I do kill -9 PID_100%_CPU, it's gonna be alive anyway.

Last edited by deathangle908 (2021-12-22 09:43:23)

deathangle908

Member

From: Ukraine

Registered: 2013-10-16

Posts: 52

Website

Re: [SOLVED] udev consuming 100% cpu, unable to kill

Ok, I just found a solution myself. Since integrated grapic to CPU just freezez and only descrete works, detaching monitors from motherboard solves the issue.
Btw I also wasn't able to poweroff the device with udev process, I was forced to press and hold power button.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,223

Re: [SOLVED] udev consuming 100% cpu, unable to kill

Udev is the HW detection daemon in linux, you don't want to kill that.

That points to a potentially lower level issue with the HW. Check/post a full journal from an affected boot e.g.

sudo journalctl -b

https://wiki.archlinux.org/title/List_o … n_services

Edit: Ah whoops, well yeah, while that's probably not the best solution, but potentially an issue with the new HW, maybe test a newer kernel/the linux-mainline package.

Last edited by V1del (2021-12-22 09:56:43)