Turned off ReBar & tried mangohud fps limiter, still no dice. Noticeable hitching is very annoying. It's definitely the problem with optimization of Forza Horizon 4 for Steam. Nothing changed compared to when I played the initial Steam version back in 2021.
I guess I will have to resort to Windows for this game.
okay so im starting to think the gnome version just has issues the other version doesnt have. i closed steam for a second to do something and now after opening it i can no longer use my trackpad
That's odd. I just checked it out and I'm getting a consistent 60FPS on my AMD Thinkpad (Ryzen 7 Pro 6850U, Radeon 680M iGPU), with Ultra settings too. I'm running the game under game mode, using Proton Experimental with no other options. I used the "benchmark mode" in the game to get it to select the best presets for me.