Steam Deck - SteamOS 3.5.9 Preview: Well Paced Edition - Steam News

Graphics and Performance

• Reduced stutters when the upscale filter was set to FSR or NIS under high GPU load.
• Fixed an issue regarding frame-pacing and stutter, especially affecting some external displays.
• Fixed display sometimes getting stuck at 60Hz after returning from sleep on the Steam UI.
• Fixed an issue where a core could be stuck at 100% CPU if a game's window closed in an unclean way.