Valve, the company behind the Steam Deck handheld gaming console, released an update called SteamOS 3.8.5 Beta on 18 June 2026. This fix addresses two problems that have been frustrating users: trouble connecting to external monitors or TVs, and performance issues when the Steam Deck works with dedicated graphics chips.

For users who dock their Steam Deck to play on a TV or monitor, the external display problem was a major annoyance that started in mid-April 2026. When Valve released SteamOS 3.8, it accidentally broke the connection to outside screens. The new update fixes that, so your dock-and-monitor setup should work smoothly again.

The second issue involves something called video memory, which is temporary storage that graphics processors use when rendering games. When a Steam Deck is docked or when SteamOS runs on other gaming devices with dedicated graphics chips, the operating system now handles that memory more intelligently. This should mean fewer stutters and more consistent frame rates in demanding games.

What Is SteamOS?

SteamOS is the operating system that runs on Steam Deck devices. Think of it as the software layer that sits between the games you play and the hardware underneath — similar to Windows on a PC or macOS on a Mac. Valve built it on Linux, an open-source operating system foundation, and customized it specifically for gaming on portable and living-room hardware.

The recent 3.8 update cycle has been rougher than normal. Beyond the display problem, there is also an ongoing network issue: a documented problem shows that wired internet connections sometimes drop after about 24 hours of continuous use. The 3.8.5 Beta does not appear to address this in its patch notes, so it remains unclear whether the fix is included.

Valve has also had some version numbering confusion during the 3.8 releases, with some early builds carrying misleading build identifiers and occasionally trying to downgrade devices to older versions. These kinds of issues matter most to people managing multiple Steam Decks in an organized way, such as in schools or arcades.

Why This Matters Beyond the Steam Deck

Valve is working to make SteamOS available on other gaming devices beyond the official Steam Deck — handhelds made by other companies and even desktop gaming machines. These fixes, particularly the one for external displays and graphics memory, are important building blocks for that larger plan. The company needs these capabilities to work reliably across many different pieces of hardware, not just the Steam Deck's standard setup.

This beta version is available now for people who opt into testing on their Steam Deck. Regular users on the stable release should see these fixes roll out in a future update, once Valve is confident they are working well.