Compatibility Report

• Name of the game with compatibility issues: ELDEN RING
• Steam AppID of the game: 1245620

System Information

• GPU: NVIDIA GeForce RTX 3090 (24 GB)
• Video driver version: NVIDIA 595.84
• Kernel version: 6.11.0-1022-oem
• Link to full system information report as [Gist](https://gist.github.com/):
• Proton version: Proton Experimental

I confirm:

• [ ] 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.

Symptoms

ELDEN RING does not start correctly under Proton on a desktop PC running Ubuntu 24.04.

When launching the game, a white screen appears for approximately 1–2 seconds, after which the game exits.

A Proton log shows that the game reaches its sound initialization code and then crashes with an access violation:

[Dantelion2 Panic]
..\..\Source\Sound\Wwise\MoWwiseMan.cpp(883)
Failed MagicOrchestra_Wwise::MOSoundManager::Initialize()

Exception 0xc0000005 (EXCEPTION_ACCESS_VIOLATION)

Unhandled exception: page fault on write access to 0x0000000000000000

The crash therefore appears to occur during initialization of the Wwise audio system (MOSoundManager::Initialize()).

The issue persists with a clean Proton prefix and with Steam Overlay disabled.

The system uses Steam installed as a Flatpak:

Steam Flatpak
Version: 1.0.0.85
Runtime: org.freedesktop.Platform/x86_64/25.08
Installation: system

The game is installed on:

/mnt/data/steam/SteamLibrary

The Steam launch output also shows OBS Vulkan capture being initialized:

[obs-vkcapture] Init Vulkan 1.5.6 (64bit)

and Steam Overlay LD_PRELOAD warnings:

ERROR: ld.so: object '.../ubuntu12_32/gameoverlayrenderer.so'
from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.

These warnings occur during startup, but the primary Proton crash observed in the Proton log is the Wwise MOSoundManager::Initialize() failure described above.

Reproduction

1. Run Ubuntu 24.04 on a desktop PC with an NVIDIA GeForce RTX 3090 using NVIDIA driver 595.84.
2. Install Steam through Flatpak.
3. Install ELDEN RING (Steam AppID 1245620).
4. Use Proton Experimental.
5. Launch the game.
6. The game displays a white screen for approximately 1–2 seconds and then exits.
7. With PROTON_LOG=1 %command% enabled, the Proton log contains:

[Dantelion2 Panic]
..\..\Source\Sound\Wwise\MoWwiseMan.cpp(883)
Failed MagicOrchestra_Wwise::MOSoundManager::Initialize()

Exception 0xc0000005 (EXCEPTION_ACCESS_VIOLATION)

Unhandled exception: page fault on write access to 0x0000000000000000

Additional system information:

• CPU: Intel Core i9
• RAM: 64 GB DDR5
• GPU: NVIDIA GeForce RTX 3090 24 GB
• OS: Ubuntu 24.04
• Display session: X11
• NVIDIA driver: 595.84
• Steam: Flatpak 1.0.0.85
• Steam Runtime: org.freedesktop.Platform 25.08
• Proton: Experimental

The issue is reproducible on every launch tested so far.