Moonlight v6.1.0-vrr9.1.1: Gaming Mode compatibility update (Beta)

This Linux refresh carries vrr9.1 onto the current upstream master and includes Moonlight's upstream workaround for the recent Gamescope/vkroots startup crash in SteamOS Gaming Mode while Valve works on the underlying bug.

The workaround does not disable VRR, HDR, hardware decoding, or Moonlight's frame pacing. It removes the need for the temporary Mesa downgrade and mask used by the vrr9.1 SteamOS installer.

What changed

• Linux: rebuilt as vrr9.1.1 with the upstream Gaming Mode compatibility workaround.
• Windows: no Windows code or binary changes are included. The MSI and portable ZIP attached here are byte-for-byte copies of the vrr9.1 downloads for convenience. Existing Windows vrr9.1 users do not need to update.
• Installer: the old SteamOS workaround script is intentionally not included.

Downloads

Steam Deck / Linux installation

1. Switch to Desktop Mode and download the .flatpak file above.

2. Open Konsole in the download folder.

3. Install or update it:

   flatpak install --user --reinstall ./Moonlight-VRR-6.1.0-vrr9.1.1-linux-x86_64.flatpak

4. If Steam still points to another Moonlight installation, remove the old non-Steam shortcut and add Moonlight again in Desktop Mode.

5. Return to Gaming Mode and launch Moonlight.

No sudo, Mesa downgrade, Flatpak mask, or installer script is required.

If you previously ran the vrr9.1 SteamOS installer, its scheduled cleanup will remove the old compatibility pin automatically. To remove it immediately, close Flatpak applications and run:

~/.local/share/moonlight-vrr9.1/reset-compatibility-fix.sh

If that file no longer exists, the cleanup has already run.

Using VRR

Use the same VRR settings and workflow as vrr9.1. This release changes Linux compatibility, not the VRR behavior.

SHA-256

76b9d1e3e990fbc27d70044baae776fcbad61338d327f127fe32806646dd37dd  Moonlight-VRR-6.1.0-vrr9.1.1-linux-x86_64.flatpak
96aa82c32b556badadd0cff0d03ebfe62b748fd55a4a65733a56a1ca57cd72f4  MoonlightPortable-x64-6.1.0-vrr9.1.zip
8bbeb125b7eea85cb681ee3e2cfab1e391a234d2ead0348547a512e3b544a178  MoonlightSetup-x64-6.1.0-vrr9.1.msi

Upstream workaround: moonlight-stream@2a1749e

Valve Gamescope issue: ValveSoftware/gamescope#2261

This is a beta release. Please report regressions with logs and the exact display/refresh-rate setup.