SteamOS 3.8.25 Beta Fixes Steam Machine Sleep Bug, Adds Steam Controller 2026 Support — Full Patch Notes

Valve has rolled out SteamOS 3.8.25 Beta, and it’s one of the more substantial updates in the 3.8 branch so far. The headline fixes target two of the more frustrating bugs that Steam Machine owners have been dealing with — the system waking immediately after being put to sleep, and CPU performance tanking after returning from sleep until a full reboot. Beyond those Steam Machine-specific fixes, the update expands hardware support significantly across third-party handhelds, adds preliminary Steam Frame Wireless Adapter drivers, and brings the new Steam Controller 2026 into the official controller driver. There’s a known FSR regression to be aware of before you opt in, which we’ll cover at the end.

The Big Steam Machine Fixes

The two sleep-related bugs being addressed in this update have been consistent pain points since the Steam Machine launched. The first — the system waking back up immediately after being put to sleep — is the kind of issue that sounds minor until you’re putting your machine to sleep from across the room and walking away, only to come back and find it fully powered on again. The second — reduced CPU performance persisting after waking from sleep until a full reboot — is more impactful, as it means affected users who didn’t know to reboot after waking could be gaming at degraded performance without realising it.

Both are now addressed in the Steam Machine Firmware 108 that ships with this beta. Valve developer Pierre-Loup Griffais confirmed on Bluesky that users can update to the beta to get the new firmware and then switch back to the stable channel if they prefer — the firmware update will persist after returning to stable, so you get the sleep fixes without needing to stay on beta long-term if the FSR regression is a concern for you.

SteamOS

Full SteamOS 3.8.25 Beta Patch Notes

Steam Machine and Steam Deck

• Fixed an issue where the system could occasionally wake up immediately after going to sleep
• Fixed a rare issue where CPU performance could be degraded until reboot after waking up from sleep
• Fixed HDMI audio dropouts with certain game and TV combinations
• Improved reliability of HDMI hotplug detection
• Added an option for lower latency audio codecs for Bluetooth devices
• Added support for waking up from the Steam Controller Wireless Adapter (2015)
• Improved battery indications when the device is charging but using more power than the charger can provide
• Preliminary support for the Steam Frame Wireless Adapter
• Added support for Steam Controller (2026) to the built-in hid_steam controller driver, enabling use with native controller applications when Steam is not running
• Fixed an issue where hotplugging HDMI displays could cause lockups in Desktop Mode
• Fixed an issue where TVs supporting HDMI “Game Mode” would display the initial boot logo before engaging Game Mode, causing unnecessary delay and screen flashing
• Fixed some cases of slow or stuck Wi-Fi connections with certain adapters
• Fixed an issue causing previous SteamOS updates to fail to apply for some users
• Security and stability fixes

Third-Party Handheld Improvements

• Improved support for MSI Claw, OneXPlayer, and devices with external or no Wi-Fi adapters
• Fixed a bug where third-party handhelds ignore input when held
• Added gamepad support for MSI Claw 8 EX AI+
• Added gamepad support for Konkr FIT
• Added gamepad support for AYANEO Pocket S2
• Updated gamepad support for OneXPlayer Apex with new firmware

The Steam Frame Wireless Adapter — What We Know

The preliminary Steam Frame Wireless Adapter support is one of the more interesting inclusions in this update. The Steam Frame is Valve’s upcoming living room display solution — a thin, wall-mountable device designed to stream games from a nearby PC or Steam Machine wirelessly to your TV. The Wireless Adapter is the companion hardware piece that enables that streaming connection.

“Preliminary support” in SteamOS terms typically means Valve is laying the groundwork in the OS layer ahead of hardware availability — the drivers are in place so that when the hardware ships, it should work out of the box on a current SteamOS build rather than requiring a day-one OS update. No release date for the Steam Frame has been confirmed yet, but the inclusion of driver groundwork in a beta update is usually a signal that hardware availability isn’t far off.

Steam Controller 2026 — Now Natively Supported

The new Steam Controller (2026) is also getting official hid_steam driver support in this update. The practical implication of this is that the controller will now work correctly with native controller applications even when Steam is not running — so if you’re in Desktop Mode or using a non-Steam application, the controller behaves properly without needing Steam itself to be active as middleware. This is the same level of integration the older Steam Controller hardware had, and it matters for anyone using SteamOS on a device where they want full controller support across the whole OS rather than just within the Steam Gaming Mode environment.

Should You Opt Into the Beta Right Now?

There is one significant caveat before you switch your update channel. The beta currently has a known performance regression with FSR that was resolved in the previous stable release, version 3.8.16. If you’re playing games with FSR enabled — which is most users gaming at non-native resolution, especially on handheld — you’ll see degraded visual quality and potentially reduced performance compared to the stable channel. Valve is working to bring the fix to beta, but it’s not there yet.

The recommendation from the community, including GamingOnLinux, is straightforward: if you specifically need the Steam Machine sleep fixes or the third-party handheld additions for your particular device, opting into beta makes sense. If you’re a Steam Deck user who primarily cares about gaming performance and FSR quality, staying on stable 3.8.16 until the regression is patched is the better call. Remember that if you’re a Steam Machine owner, you can update to beta, grab the Firmware 108 update, and return to stable — the firmware persists.

To opt in, go to Settings > System > Beta Participation and select the Beta or Preview channel. To return to stable, switch back to the Stable channel in the same menu.

For more gaming and tech news this week, check out our coverage of the Take-Two Q1 2027 earnings and GTA 6’s unprecedented pre-order numbers and the Overwatch D.Mon ability kit revealed for Season 4.