protonscr

Steam High CPU Usage (100% core)

steamclosed reviewedSteam client
ValveSoftware/steam-for-linux#2621 · opened 2013-06-26 by CommanderAlchemy · updated 2026-07-27 · 10 comments · github
CCommanderAlchemy 2013-06-26 github

Issue:
Steam consumes sometimes 100% of my CPU core from startup and will do so until I terminate Steam and restart it. Cannot cleanly reproduce it other than restarting my system and or start/stop steam from the terminal couple of times.

Pic :
http://i.imgur.com/fYn2fsG.png

Strace Steam :
https://gist.github.com/CommanderAlchemy/5869631

Strace CIPCServer::Thr :
https://gist.github.com/CommanderAlchemy/5869748

Situation:
Computer launches with KDE.
Steam launches automagicaly to library.
CPU usage spikes and keeps that way.

Looking at the logs it got issues getting the time or something?

Steam System Info :
https://gist.github.com/CommanderAlchemy/4957992

TTele42 2013-06-26 github
CCommanderAlchemy 2013-06-30 github

Hm indeed it does.

DDynamicBits 2013-09-14 github

After the update yesterday (2013-09-13), I began experiencing this same issue. My strace looks the same. Steam works fine in Wine as well as on a second Linux computer.

DDynamicBits 2013-10-16 github

In my case, the problem was resolved by refreshing my Steam files.

MMrSchism 2013-10-16 github

@CommanderAlchemy: Have you attempted refreshing your steam files as @DynamicBits suggested?

CCommanderAlchemy 2013-10-19 github

@MrSchism Atm this has happend only 3 times or so, and mostly a restart of Steam worked. But will see if the reset works next time if it happens.

Kkisak-valve maintainer 2017-05-17 github

Hello @CommanderAlchemy, are you still experiencing this issue with an up to date system?

Kkisak-valve maintainer 2017-06-19 github

Closing pending feedback.

Vvolca02 2017-12-30 github

I suffer from this issue. Steam under wine sits on at least 1 CPU core permanently (>=100% CPU usage). It does NOT happen though when switching the steam to offline mode. Only online steam exhibits this behavior.

strace of the process when it does this: https://gist.github.com/volca02/0a89bf6b3f1d4a00025fcdbb24452f7b

Ddcog989 2026-07-27 github

still an issue here in mid-2026 ... and it can cause terrible in-game performance if i do not 'fix' it by randomly interacting with the Steam app (usually I open Settings > Downloads then close Settings) which seems to stop the 100% CPU from a steamwebhelper

Image

https://github.com/ValveSoftware/steam-for-linux/issues/13455