Every PC I’ve ever used automatically detects and adjusts resolution to the display you connect to it. Even Nintendo Switch will detect when it’s docked and automatically adjust the display resolution. But on Steam Deck you literally have to adjust the display resolution for every game, every time you switch displays.
Since getting the SD I have shoved my PC into another room to displace the heat (until I get a mini-split) and I just stream from it to the Deck, whether docked at my desk or on the couch or on the big screen. But this really complicates that process unnecessarily.
This has also not been fixed in Nobara or Chimera.
What’s the limitation there?
Yes this is annoying. I like to play games docked, and in order to get them working correctly I have to manually tell Steam to use 1080p resolution for every game. This then gives you more options within the game settings (rather than maxing out at 1200x800) whilst docked. But in most cases I have to then change the in-game setting each time I go from docked to portable.
It does feel like docking is an afterthought with the Steam Deck. I was expecting something more akin to the Switch which has a flawless docking experience. I hope SteamOS improves on this in future.