Are you sure this is a proton related error and not caused by using a snap version of steam?
Because Snap is sandboxed it might be denying access to your audio hardware and therefore crashing when it sets up the audio for the lobby.
Running the below commands might fix the issue by giving permission to access your audio hardware.
snap connect steam:audio-playback
snap connect steam:audio-record
snap connect steam:network-control
This fixed it-- thank you so much!
This fixed it-- thank you so much!
Thanks for feeding back on this. I'm glad it fixed it for you and that's what this community is about.
proton 10.0-4x1 2026-06proton experimentalx1 2026-06
Compatibility Report
System Information
I confirm:
Symptoms
steam-2794590.log
Reproduction