In reply to @matejc:matrix.matejc.com
@Nila The Dragon I "had" a similar issues with certain games, where mouse just escapes the game at some ocasions... But I have found a workaround: I have both screens with a gap in between (left monitor (1920x1080): pos 0,0 and the gaming monitor on the right with pos: 2000,0), that way the mouse just does not pass to the other monitor (at least on Niri... I have zero clue how this works on Gnome) - I have a keybinding for passing the cursor/focus around. The reason that I written had in quotes is that I havent tried without this workaround for quite some time.

In reply to @matejc:matrix.matejc.com
I have no clue on how to do it with official Proton 10, but with Proton GE 10, you can just set PROTONENABLEWAYLAND=1 before launching a game

anyways, here's the config:

  jovian = {
    steam = {
      enable = true;
      user = "codebam";
      autoStart = true;
      desktopSession = "plasma";
    };
    devices = {
      steamdeck = {
        enable = true;
        autoUpdate = true;
        enableControllerUdevRules = true;
        enableSoundSupport = true;
        enablePerfControlUdevRules = true;
        enableOsFanControl = true;
        enableDefaultStage1Modules = true;
        enableFwupdBiosUpdates = true;
        enableGyroDsuService = true;
      };
    };
    hardware = {
      amd = {
        gpu = {
          enableBacklightControl = true;
          enableEarlyModesetting = true;
        };
      };
    };
    steamos = {
      useSteamOSConfig = true;
    };
  };

anyways, here's the config:

  jovian = {
    steam = {
      enable = true;
      user = "codebam";
      autoStart = true;
      desktopSession = "plasma";
    };
    devices = {
      steamdeck = {
        enable = true;
        autoUpdate = true;
        enableControllerUdevRules = true;
        enableSoundSupport = true;
        enablePerfControlUdevRules = true;
        enableOsFanControl = true;
        enableDefaultStage1Modules = true;
        enableFwupdBiosUpdates = true;
        enableGyroDsuService = true;
      };
    };
    hardware = {
      amd = {
        gpu = {
          enableBacklightControl = true;
          enableEarlyModesetting = true;
        };
      };
    };
    steamos = {
      useSteamOSConfig = true;
    };
  };