# Steam SteamOS 3.8.23 Beta

- Product: Steam (https://whatsnew.fyi/product/steam)
- Vendor: Valve
- Date: 2026-07-15
- Original notes: https://store.steampowered.com/news/app/1675200/view/698770449667981485
- Permalink: https://whatsnew.fyi/product/steam/releases/2026-07-15-steamos-3.8.23-beta
- Labels: Platforms: Desktop

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

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- **fixed** — Fixed delayed start time for some games under Proton when no capture device is present
- **security** — Security and stability improvements

This update is for the SteamOS Beta and Preview channels, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel.

_Note: This beta contains changes that were simultaneously released to SteamOS stable channel as _[3.8.15](https://store.steampowered.com/news/app/1675200/view/698770449667981483)_,_ _noted below_

**Known Issues - Beta**

- There is a known issue with degraded performance in some cases when composition is required (such as when having FSR enabled).

**This issue is fixed in the latest SteamOS stable release** (3.8.15).  Affected users may wish to switch to the stable update channel while we work on bringing this fix to the beta channel.

**General**

- Fixed delayed start time for some games under Proton when no capture device is present

- Security and stability improvements

**Fixed in 3.8.15**

- Fixed an issue with HDR in Assassin's Creed Black Flag Resynced