Made progress on my #SteamDeck. I configured an external display in game mode and desktop mode. Targeting 1080p on a 4k tv. Game mode seems to force the default resolution of 1280x720 on the external display but desktop mode offers whatever the configured resolution is so using that. #PummelParty worked great at 1080 60fps and detected both controllers I had paired. Less luck with #SonicAllstars. Got #RetroDeck installed, next step is configuring yuzu and getting the files in the right place.