protonscr

Demeo

protonopen appid 1484280Game compatibility - Unofficial
ValveSoftware/Proton#9289 · opened 2025-12-06 by Patola · updated 2025-12-07 · 2 comments · github · game page · search this game
PPatola 2025-12-06 github

Compatibility Report

  • Name of the game with compatibility issues: Demeo
  • Steam AppID of the game: 1484280

System Information

  • GPU: RX 7900 XTX
  • Video driver version: Mesa 25.2.7
  • Kernel version: 6.17.10-273-tkg-eevdf
  • Link to full system information report as Gist: https://gist.github.com/Patola/e56c58f70d70e30c6accf3e71b352a18
  • Proton version: 10.0-3, but also tried 9.0-5, 8.0-5 and even GE-Proton10-25 (unsupported, I know), removing the pfx between attempts, and the symptoms are exactly the same.

I confirm:

  • [X] that I haven't found an existing compatibility report for this game.
  • [X] that I have checked whether there are updates for my system available.

Notes:

  • This is about running the game in VR (headset is the Meta Quest 3). The game has an optional VR mode (it was the only mode when released). In the flatscreen, the game works perfectly with all proton versions.
  • I am attaching two proton logs:
    1 - regular PROTON_LOG=1 %command%
    2 - PROTON_LOG=+vrclient,+openxr,+file %command% for more verbose VR-related debug. This one is zipped.

Symptoms

When called from SteamVR, the game shows a black screen (indicating it started and initialized VR) but hangs there. Nothing appears and the game has to be killed.

This is when being streamed via the officially supported Steam Link.

Also, and I know it's unsupported but it can work as a comparison: if the streaming is done by WiVRn + xrizer (openvr->openxr translator), xrizer crashes at the start and the game exits. I can get a log when this happens if needed.

Reproduction

Either press "PLAY" when in SteamVR or, with SteamVR running, press "PLAY" on the flatscreen and select the SteamVR option.

steam-1484280-vrclient-openxr-file.zip
steam-1484280-PROTON_LOG-1.log

PPatola 2025-12-06 github

For the record, everything I am using is official. It's regular Proton 10.0-3 stable. It's SteamVR stable 2.14.4 with Steam Link. On the Meta Quest 3 I am using the official Steam Link application.

The mentions of the unofficial applications are just for comparison. I made sure to not let any trace of their installation or files interfere with the tests with official versions.

I don't understand why the bug report was tagged as unofficial, @kisak-valve

PPatola 2025-12-07 github

I've brought SteamVR back to previous version - 2.12.14 and Demeo now starts and works normally. So it seems to be a regression from SteamVR.

Proton versions

Launch options