Portal with -vulkan causes GPU hang and system freeze #671

Description

When launching through the steam client Portal's native Linux version crashed twice. I then tried the -vulkan boot argument which froze the entire system and required a forced shutdown.

The previous boot log shows repeated GPU timeouts and failed recovery attempts.

Fedora Asahi Remix 45, KDE Plasma, M1 Pro, kernel 7.2.12-402.asahi.fc45.aarch64+16k, Mesa 26.2.6.

Repro Steps

1. Launch Portal through Steam.
2. Add -vulkan to the launch options.
3. Launch again.

The system froze (same result on 2nd attempt).

Expected Behaviour

The game should not freeze the entire system.

Upload Files

portal_logs.txt

Please agree to the following

• I have reproduced this on Fedora Asahi Remix
• I have isolated this issue to software vendored by Asahi Linux
• I am not acting as a meat proxy for an LLM