Valve has released SteamOS 3.8.15 to the stable channel, which includes a crucial composition performance patch and an HDR fix for Assassin's Creed Black Flag Resync. Simultaneously, SteamOS 3.8.23 was launched in the beta channel, but it lacks the composition improvement found in the stable update, leading to a rare situation where stable surpasses beta in functionality. Users on the beta experiencing performance issues are advised to switch to the stable version to access the necessary fixes immediately. Additionally, while the beta includes a Proton fix for delayed start times, the composition degradation issue remains unresolved in the beta version, prompting Valve to recommend that beta testers wait for the next update

Valve Releases SteamOS 3.8.15 Stable Update with Composition Fix and HDR Patch

Valve has released SteamOS 3.8.15 to stable and 3.8.23 to beta, with the stable update delivering a critical composition performance patch and an HDR fix for Assassin's Creed Black Flag Resync. The beta channel includes a Proton fix for delayed game start times but lacks the composition improvement, creating a rare scenario where stable effectively leapfrogs the preview channel. Valve explicitly advises beta users experiencing performance degradation to switch to stable immediately, as the necessary fix is already live there and hasn't synchronized downstream.

Valve Releases SteamOS 3.8.15 Stable Update with Composition Fix and HDR Patch @ Linux Compatible