Your system information

• Steam client version (build number or date): 1710281934 Tue, Mar 12 9:14 PM UTC -00:00
• Distribution (e.g. Ubuntu): Manjaro/KDE 5.27.10
• Opted into Steam client beta?: [Yes/No] No happens with both
• Have you checked for system updates?: [Yes/No] Yes
• Steam Logs: [generate by running this command in a terminal tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]
• GPU: Nvidia/Intel/AMD Nvidia

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

When steam is running in the background, regardless of whether it's doing something or not, there is a constant CPU usage of 20-30% (on a 16 core system) and a memory usage of at least 2GB). The problem appears sporadic and at first turning off the client beta appeared to fix it, but since them I've had the problem reoccur twice which has led to me having to shut down steam.

Sometimes I will notice it when I start up my system in the morning and go to make breakfast. I will then come back to find my laptop's fan is running at full spead and it is warm to the touch. Checking system status will reveal steam to be holding onto the CPU, and opening steam to check I will see it's not doing anything - no updates installing, nothing.

Other times I will be using my laptop normally and I will remove my headphones and hear the fan is running. Again, the laptop is hot to the touch, and steam is using 28-30% of my CPU. I had not opened steam; I will check it, and once again there are no updates happening.

As a program that's supposed to be running at all times on someone's system (to provide notifications, messages, invites, install updates, etc) I would expect it to not do this. Naturally some peaks would occur, but those should drop of fairly quickly as games are updated and those updates complete. Instead Steam seems to be sitting on high CPU usage for seemingly no reason at all and it does this for indeterminate amounts of time.

Steps for reproducing this issue:

1. Install the "Steam (Steam)" package from the official repositories (not flatpak)
2. Set it to run at startup. Steam > Settings > Interface > Set "Run Steam when my computer starts" to [on]
3. Set steam to run silently at startup (included in case it may have an effect)
   1. Open System Settings
   2. Startup and Shutdown > Autostart > Steam (Runtime) > Application tab
   3. Change arguments to "-silent -minimized -vgui -nofriendsui %U"
   4. Click "OK"
4. Restart system