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New SteamOS 3.8.26 Beta released with multiple important fixes

This version will be tested first before Valve moves it to the Stable channel.
ⓘ Valve
This version will be tested first before Valve moves it to the Stable channel.
Valve has released a new SteamOS Beta update: version 3.8.26. This update is available to download for users who have opted into the Beta or Preview channel.
Gaming

Valve has released a new SteamOS Beta update, with version 3.8.26 now available for users who have opted into the Beta or Preview channel on their devices. Like other beta releases, this update will be tested by users first before Valve eventually moves it to the Stable channel.

SteamOS Beta 3.8.26 fixes and improvements 

The latest version mainly focuses on fixing problems found in previous beta builds. One of the more important changes addresses performance issues when composition is required, such as when using FSR. Valve says the previous beta could cause degraded performance in some of these situations, and the latest update fixes the problem.

SteamOS Beta 3.8.26 also brings several improvements for gaming and desktop use. An issue that could cause Unreal Engine 5 VR games to show a blank image in the right eye has been worked around, while Bluetooth instability affecting the Nintendo Switch Pro Controller (v1) has also been fixed.

The update also addresses a few problems on other handheld PCs. Valve has fixed a Wi-Fi issue affecting the MSI Claw A1M, as well as battery display problems on Lenovo Legion Go models. Another fix prevents the MSI Claw from freezing when resuming from sleep with an SD card inserted. 

You can check out the complete list of fixes and changes introduced in SteamOS Beta 3.8.26 below: 

  • Fixed an issue present in previous beta builds causing degraded performance in some cases when composition is required (such as when having FSR enabled)
  • Fixed Firefox in Desktop Mode sometimes freezing when fullscreen
  • Worked around an issue where Unreal Engine 5 VR games could display a blank right eye
  • Fixed Bluetooth instability with Nintendo Switch Pro (v1) controller
  • Fixed Desktop Mode allowing resolutions below 640x480 on certain displays, rendering it unusable
  • Fixed a regression from previous beta breaking WiFi connectivity on the MSI Claw A1M
  • Fixed issues with battery display on Lenovo Legion Go models
  • Fixed a bug where the MSI Claw would freeze on resume if an SD card was present during suspend and resume
  • Fixed a bug where the system would freeze on resume if an SD card was removed while suspended

Source(s)

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2026 08 > New SteamOS 3.8.26 Beta released with multiple important fixes
Abdul Haddi, 2026-08-29 (Update: 2026-08-29)