Jebblue Thanks for the log! Indeed Vulkan runs out of VRAM which is the reason for this crash - unfortunately the Linux version is quite VRAM hungry and - unlike Unitys DirectX 11 or Metal implementation - suffers from memory leaks apparently. I'm pretty sure that's a bug in Unitys Vulkan implementation (but this could also be related to the HDRP). For this reason we've raised our minimum requirement to 2 GB VRAM some time ago.
Only thing you could do is reduce the graphics settings. If you can make it to the graphics settings, you can change them there (select the "low" preset or maybe "medium"). If the game crashes earlier, open the config.properties file in the _New Version folder with a text editor and set "Graphic_ShadowsEnabled" to false and "Graphic_TextureQuality" to 0, then save the file. That should be enough to run the game without getting an OOM crash.
Thank you red51. I tried those and got the game to start once with a white screen. Trying again, Vulkan keeps complaining. Trying settings which I use for my other games (Native Linux and Windows games on Steam Proton) and Vulkan keeps crashing the game. I tried my normal resolution I play games in 1920x1080 and tried the settings that were default in the config.properties.
1.5 on a GTX-660 with 16G MB RAM plays my other games including AAA titles (several) native and Steam Proton on low to medium settings so I know that is enough and probably will be for a few more years. Perhaps this new version of the game is doing some awesome stuff that even the current AAA games aren't doing yet.
I appreciate the effort. If you choose to look whenever you have free time, I'll add my latest settings and game log files.