[Bug]: Windows 11 guest - WPF applications do not render with GPU acceleration enabled (7.2.5-171653, Linux host)

[FlakyBlueJay]

Version

trunk/main

Host OS Type

Linux

Host OS name + version

Arch Linux (rolling)

Host Architecture

x86

Guest OS Type

Windows

Guest Architecture

x86

Guest OS name + version

Windows 11 25H2

Component

3D Support

What happened?

When GPU acceleration is enabled on VirtualBox 7.2.5-171653, WPF windows appear to not render properly, rendering a blank window instead of any components. Win32 and WinUI appear to run fine.

Some instability may occur in this state, as I was able to get the virtual machine to hang simply by closing another window while it was rendering.

VBox.log.3.log

How can we reproduce this?

1. Enable GPU acceleration on a Windows VM and boot it up.
2. Run an app that uses WPF for its user interface - such as Winutil or AMWin-RP
3. See that a blank window is being rendered and none of the components are.

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.

[merlinz01]

I don't know if it's related, but the installer window for Windows Store apps like MSN Weather show a black window if GPU acceleration is enabled. VirtualBox 7.2.97 r171659.

[FlakyBlueJay]

Could be related if Microsoft is using WPF (or something XAML-based) for that interface in particular.

[warriortimothy19-bot]

like more specific guidelines, see the [Contributor Covenant Code of Conduct][COC].