million OP , 2 months ago Here is my understanding of this now I've got everything working on my Flatpak install of Steam: MangoHud Mangohud is installed as another Flatpak, org.freedesktop.Platform.VulkanLayer.MangoHud I don't think I ever installed this manually, I believe the Steam Flatpak will bring this as a dependency To tell a game to use MangoHud you add MANGOHUD=1 %command% to the Steam launch options of the game Alternatively you can use like Flatseal to add MANGOHUD=1 to the Steam FlatPak to get this working in every game by default Gamemode You need to install the Gamemode daemon, gamemoded as a system package Once that is installed you can add gamemoderun %command% to the launch options to run the game with Gamemode enabled
Here is my understanding of this now I've got everything working on my Flatpak install of Steam:
org.freedesktop.Platform.VulkanLayer.MangoHud
MANGOHUD=1 %command%
MANGOHUD=1
gamemoderun %command%