Note: This update is for the Steam Deck 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 3.7 release, with the new changes since the previous 3.8.8 Beta noted below

New in 3.8.9

• Fixed a 3.8 regression where "Allow Tearing" could result in graphical artifacts beyond the expected tear line

• Improved dynamic detection of HDMI audio channel count on hotplug

• Even more stability and security updates

General

• Fixed a case where WiFi performance could become degraded until the device was put to sleep or manually reconnected

• Fixed excessive trackpad sensitivity on certain early Steam Deck LCD models

• Fixed a bug on Steam Deck OLED where rebooting would occasionally cause a loss of speaker output until rebooted again

• Initial support for upcoming Steam Machine hardware

• Added support for waking from sleep via connected Steam Controller

• Added preliminary support for HDMI VRR for devices with native HDMI output

• Updated Arch system base

• Updated graphics driver with performance and stability fixes

• Fixed an issue where "Allow Tearing" wouldn't have the intended effect in certain configurations

• Fixed a case where per-app performance settings would intermittently fail to apply when launching a game

• Substantially improved speed of future OS updates on high-speed connections

• Improved support for the screencasts in Game Mode (e.g. OBS/Discord)

• Fixed dropdown menus not appearing in some games

• Improved VRR frame pacing

• Fixed FSR badge remaining off in the performance overlay, even if it was actually active

• Improved support for games that attempt to open PDF files in external viewers

• Fixed an issue where video output could become frozen while using Remote Play

• Fixed a possible session crash when using Game Recording with certain "Maximum video height" settings

• Added missing graphics features needed for titles such as "Crimson Desert"

• Fixed an issue affecting certain titles (such as "SpongeBob SquarePants: Titans of the Tide") where the game window could have an incorrect position

• Fixed closing certain titles (such as "STAR WARS Jedi: Survivor™") and Starfield resulting in a session crash

• Improved support for certain USB racing wheels and USB devices that boot in a non-standard mode

  • Frequently these are devices that appear as USB storage devices with a driver installer, and must be switched to their normal mode by the OS

• Steam Deck controller firmware updates now display update progress on the splash screen

• Fixes issue on specific Steam Deck revisions where firmware updates could render the left controller inoperative for that session

• Fixes for experimental nested desktop mode

• Numerous stability and security updates

• Fixed an issue on certain TCL TVs where the display may remain blank using the Steam Deck Dock when VRR is enabled (requires a Dock firmware update)

Bluetooth

• Re-re-enable Bluetooth Wake for Steam Deck LCD

  • Fix for more spurious wake issues that were present in earlier attempts

Audio

• Detect HDMI channel count and expose surround configuration if available

• Add a setting to allow using Bluetooth headset mics (Bluetooth playback quality will be worse while capture is active)

• Restore internal audio device on reboot if set to "Off" in desktop mode

• Increase suspend timeout for HDMI devices so initial audio isn't cut off after a few seconds of inactivity

• Fixed a bug with switching input devices when a wired headset is plugged in

• Fixed an issue where audio underruns could be experienced after sleep/resume

Accessibility

• Added an option to force mono audio output

Desktop Mode

• KDE Plasma updated to version 6.4.3 from 6.2.5, and now uses wayland by default

  • Fixes several cases of reduced performance in Desktop Mode compared to Game Mode

  • Improved support for rotated displays

  • Better scale factor out of the box on TVs

  • Adds support for external HDR displays

  • Adds support for VRR displays

  • Adds support per-display scale factor

  • For more information, see Plasma release announcements

    • https://kde.org/announcements/plasma/6/6.3.0/

    • https://kde.org/announcements/plasma/6/6.4.0/

• Keyboard layout and language are now obeying Game Mode settings

• Improved windowing behavior for games running in Proton

• Fixed a bug in Desktop Mode causing previously open applications to not be remembered when using the 'Return to Gaming Mode' shortcut to logout

System Firmware

• Includes Steam Deck LCD BIOS v133

  • Security updates

  • Added "Memory Power Down" setup option

  • Preliminary support for hibernation

• Includes Steam Deck OLED BIOS v114

  • Security updates

  • Charging LED now changes color when charge limit is reached, rather than only at 100%

Non-Deck

• Improved compatibility with recent Intel and AMD platforms

• Greatly improved video memory management on discrete GPU platforms

• Fixed a compatibility issue with the SteamOS chainloader that could cause a boot failure on some desktop systems with recent UEFI firmware

• Power button short and long presses now supported across a wide variety of devices

• Improved controller support for OneXPlayer F1 series, GPD Win 5, GPD Win Mini, Anbernic Win600, OrangePi NEO, and Lenovo Legion Go

• Added controller support for OneXPlayer X1 series and Lenovo Legion Go 2

• Added system and controller firmware update support for the Lenovo Legion Go 2

• Added preliminary charge limiting support for Legion Go, Legion Go S, and Legion Go 2 - currently only accessible in Desktop Mode

• Added controller RGB LED color settings for the Lenovo Legion Go 2

• Added controller, TDP control, and speaker audio support for the ASUS ROG Xbox Ally series

• Reduced handheld controller input latency from 5-8ms to 100-500us

• Night mode, color vibrance, and color temperature sliders in Steam now work on Z2E and later AMD APUs

• Seamless boot fixes for Z2E and later AMD APUs

• Automatically handle internally rotated display for some third-party handhelds

• Improved motion control support for handhelds with BMI260 IMUs

• SD card reliability improvements for some third-party handhelds, including ASUS ROG Xbox Ally, Legion Go 1, Legion Go S, Legion Go 2, and MSI Claw

• Fixed washed out colors for Zotac and OneXPlayer handhelds with OLED

• Fixed some GPU hangs on Phoenix APU devices (Tales of Arise, Octopath Traveler II)

• Fixed ASUS ROG Ally power consumption from fingerprint reader while shut down

• Fixed trackpad losing functionality after sleep/resume on the Legion Go

• Fixed spurious wake-ups when using a Logitech Bolt receiver

• Add controller support for MSI Claw devices (A1M, 7 AI+ A2VM, 8 AI+ A2VM, A8 BZ2EM)

• Add controller support for OneXPlayer APEX and X1 series.

• Improved gyro response for devices that use AccelGyro3D (Legion Go 1, Claw A1M)

• Fixed a system crash on international Asus ROG Xbox Ally models

• Fix Bluetooth not working on some Intel handhelds

• Add initial firmware for upcoming Intel handhelds

Developer

• Desktop Mode now uses Wayland by default

  • X11 support may still be selected via Steam developer settings, or via `steamosctl`

• Updated Linux kernel to 6.16

• Steam now uses steamos-manager to query available desktop sessions and trigger desktop session switching

• Added support for setting the desktop password in developer settings

• Initial support for running as a Virtual Machine guest (virtio guest drivers)

• Added support for third-party devices to trigger the SteamOS boot menu via EFI variable

• Added `custom-update` verb to `atomupd-manager` for easier testing of specific builds

• System reports now include more audio debug information

• Initial support for LAVD CPU scheduler via `steamosctl set-cpu-scheduler lavd`

We have just shipped an updated Steam Deck Client to the Preview/Beta channel.

Remote Play

• The enhanced streaming presets use "Unlimited" (adaptive up to 250 Mbit/s) bandwidth

Steam Input

• Fixed an issue with saving out autosaves with multiple Xbox controllers of the same type connected

We have just shipped an updated Steam Deck Client to the Preview/Beta channel.

General

• Fixed video autoplay not working in some cases.

• Fixed webusb notifications showing for some devices when connected.

Steam Input

• Fixed a case where newly exported templates would not show up in the controller configurator until restarting the Steam client

We have just shipped an updated Steam Deck Client to the Preview/Beta channel.

Remote Play

• Added a 100 Mbit/s bandwidth option

• The "Unlimited" bandwidth option allows adaptive bitrate up to 250 MBit/s when connecting to the latest Steam beta

We have just shipped an updated Steam Deck Client to the Stable channel.

Steam Networking

• Fixed a bug causing NAT traversal to fail for many P2P connections