SteamOS 3.4 Preview - Update


Well-known member
Feb 3, 2022

11. Nov. 2022​

SteamOS 3.4 Preview - Updates to desktop, performance settings, storage and more​

Note: This update is for the Steam Deck Preview channel, and includes new features that are still being tested. You can opt into this in Settings > System > Steam Update Channel.

Rebased SteamOS on the latest version of Arch Linux

  • This update pulls in the latest performance, security and stability fixes for the underlying packages that are the foundation for SteamOS
  • Most notably, this includes recent changes to KDE Plasma, Steam Deck's Desktop Mode. Full notes on these updates can be found on KDE's website here, here, and here. Here are a few of the highlights:
    • New Overview view to see all open windows and virtual desktops
    • Updates to KRunner, the built in assistant for searching and running tasks
    • New touchscreen gestures
    • New themes and wallpapers
    • Updates to widgets

Performance profiles

  • New option to allow Screen Tearing
  • Changed performance HUD level 2 to use a horizontal layout. It fits in the letterbox space for games running in a 16:9 aspect ratio.


  • Re-enabled TRIM for the internal drive as well as supported external storage devices, improving write performance
    • This includes a workaround ensuring that TRIM operations are safe for SD cards that advertise discard support but do not support it
    • Steam will periodically TRIM storage devices as needed
    • New button in Settings → System → Advanced to run trim immediately
  • Added an eject option for removable drives in Settings → Storage
    • This unmounts the removable drive, it does not physically eject it
  • External drives formatted as ext4 are now automatically mounted and available for use in Steam


  • Disabled built-in DualShock 4 and DualSense trackpad → mouse emulation when Steam is running
  • Changed timing of virtual keypresses to improve game compatibility with on-screen keyboard
    • Fixes input issues with apps such as Street Fighter V, EA app
  • Fixed Steam Input's action set switching based on cursor visibility in Game mode
  • Re-enabled the built-in gamepad driver when Steam is not running in desktop mode


  • Fixed a case where the default audio device would display "echo-cancel-sink" and audio controls would cease to work correctly
  • Fixed a case where some applications would output audio to the wrong device
  • Fixed an issue with HDMI/DisplayPort audio going to sleep after being idle on external displays


  • Fixed a performance issue that could cause 100ms hitches during gameplay if adaptive backlight was enabled
  • Fixed issue with opening file managers if the gamescope session has been restarted
  • Fixed issues with sleep / wake for a number of titles
  • Fixed GPU clock settings sometimes not sticking if set manually (thanks to user xperia64 for the amdgpu kernel patch backport)
  • Fixed an issue with fan controller excessive sensor polling causing sporadic fan behavior and higher SSD temps on some NVME drives
  • New firmware for Docking Station
    • Fixes an issue where HDMI 2.0 displays are not detected during wake or boot up
  • Known Issue: Chinese Pinyin and Zhuyin input for the on-screen keyboard are not currently functioning correctly - we are aware of the issues and will address in an upcoming update.


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