this post was submitted on 28 Feb 2024
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Help using Mangohud / Gamemode with Flatpak version of Lutris and Steam (self.linux_gaming)
submitted 10 months ago by million to c/linux_gaming
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Like the title says I am trying to understand how these things should work together. Part of my issue is I don't have a good mental model on the Flatpak permissioning / sandbox model. My use case is running a game on Lutris, which is a Flatpack, and using my package install of Mangohud. I am also curious if I should using a Flatpak version of Mangohud instead of the package installed version, and understanding how I would set up Steam as a Flatpak in the future when I switch away from the packaged version.

Thanks for any helpful tips or links you can provide.

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[–] million 1 points 10 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