Quick answer: SteamOS 3.10.0 is an early Preview build Valve posted on November 13, 2026 at about 8:04 PM CT. It adds HDMI 2.1 VRR, FRL and ALLM support on AMD graphics, Mesh Shader support on NVIDIA Turing and newer GPUs, smoother VRR behavior in Game Mode and a Linux 7.3 kernel. It is only on the Preview channel, and Valve has not given a date for the Stable channel.
Valve has pushed SteamOS 3.10.0 to the Steam Deck Preview channel, and this one is all about displays. The official Steam Deck news post went up on Friday, November 13 at about 8:04 PM CT, one day after the SteamOS 3.9.6 beta. Valve calls it an early Preview build that “may contain unexpected bugs or stability issues,” so read the known issue below before you switch.
HDMI 2.1 on AMD and Mesh Shaders on NVIDIA
The headline line in Valve’s notes is under AMD Graphics: SteamOS now supports HDMI 2.1 VRR, FRL and ALLM. In plain terms:
- VRR (variable refresh rate) lets the display match the game’s framerate over HDMI.
- FRL (Fixed Rate Link) is the HDMI 2.1 signaling mode that carries more bandwidth.
- ALLM (Auto Low Latency Mode) lets a TV switch to its game mode automatically.
Valve lists one known issue: the display may stay blank with the Dell G3223Q monitor. On the NVIDIA side, SteamOS adds Mesh Shader support on Turing and newer (that is the GeForce RTX 20 series onward), general stability and performance improvements, and fixes for rendering corruption in Shadow of the Tomb Raider and The Surge 2.
Game Mode fixes
- Better frame timing when you use the framerate limiter with VRR.
- Less screen flicker when VRR is on while you navigate the Steam UI or leave it idle.
- Cursor movement under VRR now matches the game’s framerate above 30 FPS, instead of spiking the panel to its maximum refresh rate.
- A fix for scaling that caused overexposure in some HDR games, such as Control.
- A fix for flickering and stale frames in games such as UBOAT and The Fruit of Grisaia.
- Support for the VK_EXT_present_timing Vulkan extension.
- HDR and brightness adjustment support for the ASUS ROG Xbox Ally X20.
Under the hood, and how to opt in
Valve also updated the Arch Linux base, moved Desktop Mode from KDE Plasma 6.7.3 to Plasma 6.8.2 and rebased the kernel on Linux 7.3. Smaller fixes stop the “Slow Charger” alert from appearing by mistake and stop Bluetooth audio from disconnecting when you switch between Desktop and Game Mode. Valve says the notes are an overview and may not include every change.
- Open Settings on your Steam Deck or SteamOS device.
- Go to System, then System Update Channel.
- Pick Preview, check for updates and restart when asked.
If something breaks, Valve asks you to file a bug on the SteamOS issue tracker on GitHub. You can switch back to Stable from the same menu.
Our take
HDMI 2.1 is the part people will talk about, but it matters most if you run SteamOS on AMD hardware plugged into a TV or monitor over HDMI. If you mostly play handheld, the VRR cursor and flicker fixes are the quiet wins. Either way, this is a Preview build with a known blank screen issue, so we would wait for it to reach Beta unless you want to test it and report bugs.
Source: Valve, “SteamOS 3.10.0 Preview” (Steam Deck news, November 13, 2026). Release notes confirmed against GamingOnLinux and VideoCardz (November 14, 2026).
