Valve recently changed how applications run on Linux/Steam. It now defaults to run applications inside a Steam Linux Runtime. This can cause issues in Blender, such as crashing when rendering with Cycles on a GPU. Please take a look at the [url=https://developer.blender.org/docs/handbook/release_process/stores/steam/#known-issues]Blender documentation[/url] how to workaround these issues for now. We are looking into a better solution for the future. Happy Blending!