Your system information

• Steam client version (build number or date): 1676336721 (Feb 14, 2023)
• Distribution: EndeavourOS (Arch)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist

Steam client uses 100% CPU when idle. Doesn't go away after any time period it seems. Steam will continue using 100% CPU until closed or a game is opened. When a game is running the Steam client's CPU usage drops to a normal level.

Once the game is closed the Steam client CPU usage spikes right back up to 100%.

This issue started about 3 weeks ago for me. I reported in on another issue here.
However reviewing the original poster's issues, we seem to have been reporting on different issues.

I did not have any hardware changes between when this issue started and beforehand. Likewise I did not have any software updates between when it started and not (leading me to speculate if it has to do with Steam's webviews).

I have updated Steam and all other packages since (using Arch package repos) regularly and no change.
Unlike the other issue, I do not have any issues with high resource usage from Discord and the amdgpu.aspm=0 kernel param did not resolve the issue.

This issue is still outstanding for me.

My machine details are below:

OS: EndeavourOS Linux x86_64
Kernel: 6.2.6-arch1-1
DE: Plasma 5.27.2
CPU: AMD Ryzen 5 5500U with Radeon Graphics (12) @ 2.100GHz
GPU: AMD ATI 03:00.0 Lucienne
GPU Driver: Mesa 22.3.6-1
Memory: 8GB

Steps for reproducing this issue:

1. Open Steam and do not open a game