Proton 11.0-1 Beta 3 brings FEX upgrades for Linux ARM64 (like the Steam Frame)

By Liam Dawe - 13 May 2026 at 12:59 pm UTC

Last updated: 13 May 2026 at 3:54 pm UTC

Valve released the latest Beta for Proton 11 which brings with it an upgrade for FEX, the emulator to run x86 applications on ARM64 Linux devices.

FEX is part of the special sauce that together with Proton and Lepton will enable many x86 Windows games to run on the upcoming Steam Frame which uses SteamOS Linux as the operating system.

The proton-11.0-1-beta3 changelog on Valve's Proton GitHub page notes:

Updated to FEX-2605.

The FEX changelogs are always quite detailed and heavy on the low-level stuff so the gist for FEX-2605 release brings: various performance improvements for 32-bit and 64-bit games, fixed a crash with controllers and lots of work towards proper support for the Snapdragon X2 Elite.

Valve's main Proton changelog states that Proton Experimental also has the Proton 11 Beta 3 changes.

If you missed other recent Steam Frame related news - Unreal Engine 5.8 adds experimental Steam Frame support, Qualcomm give the Steam Frame a dedicated page along with new Steamworks documentation for developers. GamingOnLinux also previously covered the different ways games will run on Valve's Steam Frame.

Hopefully the release announcement for the Frame isn't far off now!

Article taken from GamingOnLinux.com.

Tags: Proton, ARM, Misc, Open Source, Steam Frame

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About the author - Liam Dawe

I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly checked on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly. You can follow me personally on Mastodon [External Link].
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1 comment

Cyba.Cowboy 2 hours ago

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In my wardrobe, I have both the PlayStationVR and the PlayStationVR 2. The original model had loads of support, but has such a low refresh rate and resolution that you can't play for more than fifteen minutes without severe headaches (which seems to get worse with age). I don't have that problem with the PlayStationVR2 - but there's virtually no support for it!

Hopefully the Steam Frame - which is a stupid name - will change all that.

Last edited by Cyba.Cowboy on 13 May 2026 at 7:23 pm UTC

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