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this post was submitted on 26 Nov 2025
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Yes, it doesn't work out of the box. Proton games literally won't launch. You need to run this command (at least on atomic distros):
flatpak permission-set background background com.valvesoftware.Steam yes
https://github.com/AeonDesktop/Project/wiki/Troubleshooting#steam-flatpak-opens-but-cant-start-games
Mangohud also doesn't work without modifications, as well as a couple games having absolutely abysmal framerates like rocket league.
Gamemode doesn't work AFAIK
It is a worse experience in general, but works for a lot of people.
This is what I hate about flatpak. I shouldn't have to just know what random permission something needs. It should be marked with what permissions it requires, and then prompt for whether or not to grant them when it's launched.
If the permission was necessary, the Flathub package would enable it by default. I can't remember ever having a bad experience with the Flathub package.
On Bazzite it does just work