utmapp / utmapp/UTM

Virtual machine randomly freezes when Vulkan is enabled

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Dominant language
Swift
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Description

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**Describe the issue**
When Vulkan support is enabled (the guest OS is Fedora 44 KDE Edition), the virtual machine freezes at random times. For example, it freezes when attempting to drag a widget onto the panel (sometimes even opening panel settings is enough to cause a freeze). The virtual machine then becomes unresponsive (the window freezes and does not respond to clicks or keystrokes) and must be force-shutdown. The problem does not occur when Vulkan support is disabled.

**Configuration**
* UTM Version: 5.0.4 (123)
* macOS Version: Tahoe 26.6
* Mac Chip (Intel, M1, ...): M4

**Debug log**
[debug.log](https://github.com/user-attachments/files/30785498/debug.log)

Contributor guide

Open the contributing guide

Research direction

Start by reading the attached debug.log and compare a Fedora 44 KDE virtual machine with Vulkan enabled and disabled on the listed UTM, macOS, and M4 configuration. Reproduce the freeze using panel widget drag or panel settings; done means identifying the relevant failure evidence and preventing the VM from becoming unresponsive.

Written by the indexing model from the issue text.

Assessment

Tech stack
fedora, macos, swift
Domain
desktop, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
38/100

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