Hello @milliams, your system information is tells us that OpenGL and Vulkan render paths are healthy, both inside and outside of the Steam Linux Runtime - Soldier container environment, so I think that your issue should be evaluated on Proton's side first.
have same issue with newest The Witcher 3 update (Hotfix for remaster)
Your system information
SteamLinuxRuntime_soldier/VERSIONS.txt?:Please describe your issue in as much detail as possible:
When trying to run the Witcher 3 (I see the same with Prey too) through Proton, it seems to be failing to find the Vulkan driver
steam-292030.log:However, if I check
vulkaninfo:vkcube:The nvidia drivers are version (from
glxinfo):I have removed all other packages which would provide an ICD, so
/usr/share/vulkan/icd.d/is empty.