Valve has released a preview of SteamOS 3.5, which includes a number of new features and bug fixes for the Steam Deck. The update is available now to users who opt into the Preview channel in Settings > System > System Update Channel.
One of the most significant changes in this update is the new display options. 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.
Additionally, a new Settings > Adjust Display Colors menu has been added, allowing users to tune the display’s color vibrancy and temperature.
SteamOS 3.5 also adds HDR and VRR support for external displays. This means that users can now connect their Steam Deck to an external monitor or TV and enjoy games with high dynamic range and variable refresh rate support.
In addition to the display improvements, SteamOS 3.5 also includes a number of other new features and bug fixes.
For example, external storage devices are now auto-mounted when connected to Steam Deck, and Bluetooth connection stability has been improved. Additionally, the Arch Linux base has been updated with newer performance, security, and stability fixes.