SteamOS 3.7.20 Arrives with NTSync Driver for Deck and Security Improvements

SteamOS 3.7.20 adds the NTSync driver to the Deck and fixes Polkit issues; there are reports of improvements in some games with Proton GE.

What changes with the SteamOS 3.7.20 update

The SteamOS 3.7.20 update brings a key feature for the Deck: NTSync is now supported as a driver, promising greater precision and performance in games, especially in scenarios involving Proton GE.

Furthermore, there are security enhancements for the non-Deck line: Polkit now governs the dbus interface of InputPlumber, resolving a potential race condition and addressing vulnerabilities identified as CVEs 2025-66005 and 2025-14338.

Changelog

• General: Added the NTSync driver.
• Non-Deck: Polkit enabled for the InputPlumber dbus interface and associated race condition fix, addressing mentioned CVEs.

How to update

To download and install, go to System Settings on the Steam Deck and check for available updates. The process is simple and fast.

Test Notes

There are reports that some Call of Duty titles, such as World at War and Black Ops 1, may see improvements with Proton GE when run on the Steam Deck with the new update.

This update brings the Deck closer to a more stable and versatile experience within the SteamOS ecosystem.

Have you tested NTSync with Proton GE on your Steam Deck? Share your experience in the comments.

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