SteamOS 3.7.0 Preview brings the 'beginnings of support for non-Steam Deck handhelds'

Valve have released SteamOS 3.7.0 Preview, which they noted has the beginnings of support for non-Steam Deck handhelds! So we're closing in on the previously announced Beta for more handhelds. Although this release is still just for Steam Deck.

Since it's a Preview version you need to have your Steam Deck update settings set to Preview in Settings > System > System Update Channel.

One of the nice surprises for this Preview release is adding the ability for Bluetooth controllers to wake the LCD Steam Deck model!

Here's the full list of changes:

General

• Updated to a newer Arch Linux base
• Updated the Linux kernel to 6.11
• Updated the Mesa graphics driver base
• Desktop mode now ships with Plasma 6.2.5
• Beginnings of support for non-Steam Deck handhelds

Controllers and Input

• Add support for the Proteus Byowave controller
• Fixed an issue where Switch Pro Controller gyros might not work on first connection
• Fixed an issue with stuck/hanging controller inputs when exiting Steam

Bluetooth

• Fixed Bluetooth devices still being able to wake the Steam Deck from suspend, even when Bluetooth was disabled from Desktop mode
• Enable HFP/HSP profiles, to allow using the integrated microphone from headsets and earbuds
  • Currently only available to select in Desktop mode
• Added battery level display for supported Bluetooth devices
• Include a bugfix for the Airpods when using the AAC codec
• Bluetooth controllers can now wake LCD units from sleep, previously only available on OLED models
  • Known issue: Bluetooth LE based controllers are not currently compatible with bluetooth wake on LCD models

Steam Deck Dock

• Made compatibility improvements for certain displays including TCL FireTV models and Dell VRR capable monitors

Graphics and Performance

• Enabled AMD P-State CPU frequency control
• Fixed a performance regression for No Rest for the Wicked

Desktop

• Updated to Plasma 6.2.5 (previously 5.27.10) - see the big changes in Plasma 6 here
• Surround sound now works correctly
  • Enabling the setting is currently only available via Desktop mode
• KDE Filelight is now installed by default for disk usage visualization and low disk space notifications
• Speed and robustness improvements when switching between desktop and game mode
  • Fixed a common cause of hangs when switching to desktop mode
  • Fixed some cases where Steam could take up to ninety seconds to exit on shutdown or switch to desktop
• Added 'gocryptfs' support to desktop session to enable use of the Plasma Vaults feature

Misc

• Fixed some cases where "filter-chain" or other virtual sound devices would erroneously appear in the UI
• Fixed cases where applying system updates could fail if certain configuration files were corrupted or malformed
• Various enhancements to System Report functionality for support and troubleshooting
• Fixed compatibility issue with certain DNS servers causing very slow domain lookups
• Improved responsiveness of system when running into out-of-memory crash situations
• Enabled IPv6 Privacy Extensions by default

Known Issues

• Creative Zen Air Pro earbuds display an unexpected all-zeros entry under the "Show all devices" section when pairing
• Super NES controllers can erroneously show up as connected when they are not
• DualShock 3 controllers are currently not able to be paired or used

Developer

• Updated to a 6.11 based kernel
• Added debuginfod URLs for SteamOS
• Added systemd .socket units to the default list of /etc files preserved across updates
• When running in a VM, system will now default to the desktop session
• Swap file setup now uses standard 'mkswap' functionality instead of shipping an ad-hoc 'mkswapfile' script
• The steamos-readonly command now warns that the status might not be accurate when sysexts are loaded
• Fixed a case that could introduce duplicate boot entries for devices manually setup to dual-boot
• The pacman cache is now cleaned after applying a SteamOS update
  • Fixes stale cache errors working with pacman after switching branches

Source: Valve