Windows 11 black screen after upgrade to 24H2 in UTM

Missed the warnings on MAS:

v4.6.5 reverted a change from v4.6.4 due to reports of crashes and kernel panics on some machines. As a result, there will be issues when upgrading to Windows 11 24H2 where the screen will go black. An alternative fix is provided as a driver update. Please update the Windows driver from the CD icon -> Install Windows Guest Tools before updating Windows.

and GitHub:

v4.6.5 reverted a change from v4.6.4 due to reports of crashes and kernel panics on some machines. As a result, there will be issues when upgrading to Windows 11 24H2 where the screen will go black. An alternative fix with an updated driver will be provided as soon as possible, but for now if you plan to upgrade to Windows 11 24H2, it is recommended you do it from v4.6.4 before updating UTM.

Startup sound confirmed the VM was running. Used Alt+F4 then Enter to shut down gracefully (auto-login had been enabled previously).

In Display → Emulated Display Card, switched from virtio-ramfb to virtio-gpu-gl-pci (GPU Supported) as documented by chadlwilson (aidangoettsch adds that installer and SPICE ISOs must be ejected also).

Display returned, but keyboard and mouse required manually capturing input via the top-right Capture input devices icon (Cmd+Opt to release).

Downloaded and installed the latest Windows Guest Tools https://getutm.app/downloads/utm-guest-tools-latest.iso, which hung near completion; after a forced VM restart, input and display worked normally.

❧ 2025-08-18