That looks like you have the right driver. It might be a source engine/porting issue then. There's not much that can be done about that, except run it under pro

That looks like you have the right driver. It might be a source engine/porting issue then. There's not much that can be done about that, except run it under proton. However, as you said, that probably won't let you play on some servers. Have you tried running the game's benchmark with and without Proton? Disable vsync and set all the graphics settings to the same level, then see if one performs better than the other. That would at least confirm that the issue is due to a shitty port. > But how do I know the game is actually using these drivers ? I'm not expert on the Linux graphics stack, but if you see that in hwinfo, then it probably means the game is using it unless you have some funky switching setup (like Nvidia Optimus). The safest way to check be to read the game's logs, since it might print out that information (similar to the output of glxinfo). There are debugging tools like Renderdoc you can use, but that might get you VAC banned. Launching Steam through a terminal will show you the standard output of the Steam client, but idk if it also shows you the output of launched games. There's probably a way to do it.