For switching between Vulkan and OpenGL you can use a launch parameter. Right click on the game -> Properties -> General -> Launch options (bottom field).

Set it to "%command% +r_renderAPI 1" for Vulkan, or "%command% +r_renderAPI 0" for OpenGL.

(A more general tip is to find the game config files and just delete them instead of reinstalling!)

The crash with Vulkan is a bit harder to diagnose without error messages.

One common problem in the past was that Doom sometimes picked the wrong GPU. I.e. tried to run on the integrated Intel GPU.

Hi Whizse

Thanks for the comments.

I did see this option you commented on. But couldn't get that far, as I tried adjusting PlayOn Linux but that keeps coming up with " Running into errors".

Please forgive my ignorance, I'm a MX Linux user, I never touch Ubuntu usually. I just wanted to give a mainstream OS a go for my build. I did try POP OS out first, and loved it, until the latest update, I lost all sound output, and got fed up trying to figure it out.

But, when you say right click for properties, is that in Ubuntu, or Steam?

As, I'm sure you're aware, Ubuntu has very little in the way of options when you right click on app icon.

Thank you

Hi,

Right, those options are for the Steam client.

You can also change the renderer between Vulkan and OpenGL in the configuration file. It's a little bit fiddly to find since those are hidden in the Wine prefix named after the Steam app id.

There are instructions to find the configuration path, the options to change and so forth on PCGamingWiki. I also noticed a comment there to turn off the Steam Overlay when running the game with Vulkan, might be worth a try.

Thanks Whize

I'll try and get my head around it sometime the weekend.

Thanks for your help 👍