Valve has been working to improve SteamOS since the launch of the Steam Deck, and the latest SteamOS and Steam Client updates out of Valve combine a whole host of bug fixes that were previously fed into the testing streams. Most notably of the lot are the changes to the accessibility and Steam Input options, but Valve also fixed a few issues that have been part of the SteamOS experience for some time, including flickering UI elements, low-resolution thumbnails on the Recent Games screen of the game library, and issues with button mapping and Switch Pro controller LEDs coming on when they're not supposed to. There are also some additional improvements to features like family sharing and high contrast theme options, but the most interesting addition comes by way of the generic SteamOS 3.7.20 release.

SteamOS 3.7.20 officially merges the NTsync driver from a previous beta release into the mainline OS version, which is a change that could see some games get notably higher performance in some instances. NTsync is a Linux kernel driver that's been in a stable state for a little over a year, but in essence, it aims to increase performance by more closely matching Windows NT synchronization when using the Proton compatibility layer. Other versions of Proton and WINE have had NTsync for a while as a performance booster, but now Valve has added official support for it to the kernel, leaving less development work in the hands of the community and Valve itself. NTsync promises performance uplifts in some games, although not all of them, and it won't always necessarily offer better performance than the existing Fsync, but it gives Linux gamers another option to use when they're tinkering with Proton settings to eke out that last drop of performance.