Proton stopped working unexpectedly on X11, works on wayland.

Hello,

Recently, all Proton versions stopped working on all my games.

I've been using proton with several games without issues until yesterday, that it started to just show the "Preparing to launch" box for a moment and then nothing.

I'm not aware of any update that could have caused this.

Checking the Proton logs i see:
err:winediag:nodrv_CreateWindow Application tried to create a window, but no driver could be loaded.

Googling this error I can find some users with Wine issues but nothing seems to apply or work for me.

Messing around trying to fix it I've tried usng Wayland instead of X11 and noticed that it works flawlessly, but I'm unable to use Wayland permanently, so I need to try to fix it on X11.

I've already tried to uninstall all the games and Proton versions and reinstall them.

Full system specs reported by Steam

Full Proton log entry for the game Noita , all other tested games have the same isue (BeamNG, ASTRONEER, Rimwordl, Fallout3)

Hope you can help!

Lucas V

No source file or test is named. Start with the linked Proton log and system-spec report, comparing the X11 failure with the working Wayland configuration and the reported nodrv_CreateWindow error. Done means the affected games launch successfully on X11 across the tested Proton versions.