PROTON_NO_ESYNC=1 is used because otherwise the opening vid of the game is not displayed / does not play and poor user cannot get into the main menu of the game.
if you dont use esync the loading screen for the normal FAF games are slow as well, tho eventually it manages to disappear and launch the actual game.
i have just tried it so with Proton 5.09 it is still the case on my comp at least (AMD).
i recommend using Proton 5.09 too because DXVK is enabled by default. tho you have to install Vulkan tools on Ubuntu otherwise it falls back to opengl translation and that produces noticeably worse FPS.
https://linuxconfig.org/install-and-tes ... n-on-linuxthe stability of the game is good. not long ago i played a 1+ hour long setons game without crashes but the replays still crash at 30+ min...
the efficiency of the translation / Wine / Proton / whatever is shit tho.
i have an AMD RX5700XT + Ryzen R5 1600X, and the fans barely spin up. the game is not using the GPU, it is CPU limited big time. i barely get 30 fps in a big setons game... meanwhile GTA V gives me 100FPS... lol