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.

These notes contain all changes since the current stable SteamOS 3.8 release, with the changes added since the previous 3.9 preview releases noted below

New in SteamOS 3.9.2

General

  • Add preliminary support for Legion Go 2 brightness control

  • Fixed Steam Remote Play not working on Steam Machine when booting with no external display connected

  • Fixed “Disable Frame Limiter” toggle not working when VRR is enabled

  • Fixed the frame limiter incorrectly applying to VR titles when streaming from Steam Machine to Steam Frame

  • Fixed loss of input if a launcher window is accidentally dragged around in Game Mode

  • Fixed logging in to Desktop Mode via RDP with system users when enabled

  • Fixed an issue causing certain games (incl. ELDEN RING and DARK SOULS™ III) to fail to run on recent Panther Lake Intel CPUs

  • Worked around a firmware issue on some ASUS devices causing excessive fan speed upon waking from sleep

  • Fixed a bug causing hidden WiFi networks to fail to connect on the first attempt

  • Fixed boot screen corruption on Intel PTL+ devices

  • Fixed a regression from previous 3.9 previews causing Steam Machine to occasionally wake from hibernation unexpectedly

  • Fixed a regression from previous 3.9 previews slowing down system boot speed and causing the boot logo to briefly vanish during boot

  • Fixed a regression from previous 3.9 previews breaking virtual keyboard input for some languages in Game Mode

  • Fixed a regression from previous 3.9 previews with nested desktop mode

  • Security and stability fixes

SteamOS 3.9

General

  • Updated Arch Linux base

  • Updated Desktop Mode from Plasma 6.4.3 to Plasma 6.7.3

    • For more information, see
      https://kde.org/announcements/plasma/6/6.7.0/
      https://kde.org/announcements/plasma/6/6.6.0/
      https://kde.org/announcements/plasma/6/6.5.0/

  • Fixed a system crash when launching Forza Horizon 6 on Legion Go 2

  • Fixed an issue causing frame limits to result in lower than intended FPS on certain external displays

  • Fixed issues with suspend/resume on systems with RDNA1 or RDNA2 based dedicated GPUs

  • Security and stability updates

Misc

  • Updated the bootloader to improve compatibility with certain motherboards

  • The Desktop Mode lockscreen is no longer prevented from being explicitly enabled in settings (but remains off by default)

Developer

  • Switched WiFi backend to wpa_supplicant by default for new installations, improving compatibility with various WiFi networks

    • Enhanced wpa_supplicant to support fast WiFi reconnect on resume from sleep, previously only available in the iwd backend

    • Known issue: Existing installations will continue to use iwd unless manually enabled in Developer Settings

  • Linux kernel rebased on Linux 7.2

  • Added preliminary support for hibernation, not yet exposed in Game Mode UI

    • Enhanced Linux kernel hibernation support to enable interrupting hibernate requests and fixed various driver issues

  • Various scripts and packages have been renamed from `steamos-` to `holo-`, with aliases to the former names where appropriate

  • Improved support for running SteamOS as a VM guest with accelerated graphics (virtio-gpu, venus)

  • Updated included renderdoc version

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