I'm playing Hogwarts Legacy and needed to tune one system setting to fix occasional crashes. That's it, and that's the most trouble I've had in a few years.
Arch Linux already incremented vm.max count in a recent update, it seems fixed using these launch options: DXVK_MEMORY_LIMIT_MB=14384 PROTON_ENABLE_NVAPI=1 DXVK_ASYNC=1 PULSE_LATENCY_MSEC=30 gamemoderun %command%
Do you mind me asking you which distro you use? I've tried running BG3 on Linux Mint and I can't seem to get the game to ever load into the world. I get all the way to the in-game menu and into the loading screen after that and then it hangs and crashes. Every time. I've tried using a couple different versions of Proton, tried out a few different versions of Nvidia graphics drivers... No luck yet.