SteamOS 3.5 has just been released to the Preview channel, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel. Display The default color rendering for Steam Deck has been adjusted to emulate the sRGB color gamut, resulting in a slightly warmer and more vibrant color appearance. Added Settings -> Adjust Display Colors, to tune the display's Color Vibrancy and Color Temperature.

Highlights:

  • HDR and VRR on external displays
  • Colour calibration, with the option to emulate sRGB or even wider gamut (I was already doing this manually with a colourmeter and vkBasalt but good to see this more widely available)
  • Improved latency when game renders below the refresh rate
  • Fix on some games/emulators that would have perf issues with SMT enabled
  • Native undervolting