Garbled Image When Running Hyprland in QEMU with GVT-d Device

[growler]

I have encountered an issue with garbled images when running Hyprland in QEMU with a GVT-d device. The same configuration works with GNOME/Xwayland (though the cursor is missing, which I believe can be fixed with enough effort). I tried the workaround suggested in #142, but I keep receiving the error: 'qemu: GtkGLArea Console lacks DMABUF support'. I'm currently stuck and out of ideas, and would greatly appreciate any assistance.

vm start script:

exec /nix/store/jizyxcl0fhz616a75knj3lcfcd6b6psm-qemu-host-cpu-only-9.1.0/bin/qemu-kvm \
  -name beaker \
  -m 4096 \
  -smp 4 \
  -object memory-backend-memfd,id=mem,size=4G,share=on \
  -numa node,memdev=mem \
  -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/f0778e7a-5e82-40c9-bd5b-8c2f3ea39db9,display=on,x-igd-opregion=on \
  -display gtk,gl=on \
  -vga none \
  ...
   -kernel /nix/store/xsdfiv78drqvg4as154qn3y8g789kl5h-nixos-system-beaker-24.11.20240911.159be5d/kernel \
   -initrd /nix/store/wd0xdjn28gkkk16c3favmpzq232v4d9n-initrd-linux-6.6.50/initrd \
   -append "i915.enable_dc=0 i915.enable_guc=0 ..."

Here is the same configuration running Xwayland / Gnome

And the current Hyprland (hyprland-0.43.0+date=2024-09-12_73b9756):