SteamOS 3.8.28 adds preliminary Steam Frame adapter support, but not VR streaming

SteamOS 3.8.28 reached the stable channel on September 24, and the first line on Steam Frame is a careful one. Valve’s release notes list “preliminary support for the Steam Frame Wireless Adapter”, which puts the driver on every Steam Deck and Steam Machine without a beta opt-in.

Steam Machine gets the same SteamOS build, plus firmware 108 of its own. Image: Valve

Preliminary is Valve’s own word, and it buys nothing new for VR today: a Steam Machine still cannot stream VR games to a Steam Frame, as Valve said on September 19. The same build ran on the beta channel from September 22 before Valve promoted it.

Mesa jumps a major version and handles VRAM better

Valve updated the Mesa graphics driver “to a new major release, containing many ray-tracing performance improvements”, and credits it with “greatly improved VRAM management, improving performance and stability in cases where VRAM is limited”. Limited VRAM is the condition Valve names, so the gain lands hardest on the machines that have least of it.

The Linux kernel moves to 6.18.50, and Steam Machine picks up firmware 108, which stops the system occasionally waking straight after going to sleep and fixes a rare case of CPU performance staying degraded until a reboot. Valve also added gamepad support for three non-Valve handhelds: the MSI Claw 8 EX AI+, the Konkr FIT and the AYANEO Pocket S2.

One fix is aimed squarely at VR. Valve says it “worked around an issue where Unreal Engine 5 VR games could display a blank right eye”, which is the sort of bug that makes a headset unusable rather than merely slower.

The Steam Controller (2026) gets a kernel driver

Valve added support for the Steam Controller (2026) to the built-in hid_steam driver, “enabling use with native controller applications when Steam is not running”. The decade-old Steam Controller Wireless Adapter from 2015 can now wake a system as well.

The rest is housekeeping with teeth. Valve fixed a freeze on resume when an SD card was pulled out during suspend, degraded game performance after sleep and resume on systems with AMD discrete GPUs, lockups when HDMI displays were hotplugged in Desktop Mode, and a Steam Machine splash screen that now appears much more quickly after startup.

Audio gets a settings reset option, a fix for HDMI audio dropouts with some game and TV combinations, and an option to prefer lower-latency Bluetooth codecs. Black screens in launchers including Zenless Zone Zero and FINAL FANTASY XIV Online are fixed, and support is better on machines with an external Wi-Fi adapter or none at all.

Steam Frame runs its own SteamOS branch and takes its own updates, the first of which sped up charging and fixed a garbled microphone. For everything else Valve ships, 3.8.28 is what you get the next time you restart.

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