Hello @PierfrancescoArdino, this sounds like the expected and proper behavior for fullscreen games.
If the game has a fullscreen windowed or windowed mode, then those modes should let the mouse escape the game when it's appropriate.
Fine. I'll close the issue
Nothing extracted yet.
Feature Request
I confirm:
contain this feature already.
I do not know if it is already an open issue for this problem (I do not think so) or if it is actually a problem of Proton, but when I play a game in a dual monitor setup (using a laptop + external monitor connected via HDMI with the game rendering on the external monitor) I can not move the mouse in the second display unless alt-tabbing. There is a way to move the mouse in the second monitor and using the applications that are rendered there?