virtual: 0.954
graphic: 0.917
kernel: 0.849
peripherals: 0.825
architecture: 0.799
device: 0.768
hypervisor: 0.768
debug: 0.731
boot: 0.669
performance: 0.658
PID: 0.624
x86: 0.618
arm: 0.561
KVM: 0.548
VMM: 0.505
ppc: 0.499
user-level: 0.492
semantic: 0.482
register: 0.467
TCG: 0.428
permissions: 0.409
risc-v: 0.393
vnc: 0.381
socket: 0.373
mistranslation: 0.364
i386: 0.333
assembly: 0.307
network: 0.306
files: 0.270

qemu 8.1.0 breaks gvt-g + qemu-ui-gtk w gl=on (black screen, qemu: eglCreateImageKHR failed)
Description of problem:
As of 8.1.0, qemu-ui-gtk renders a black window with the error `qemu: eglCreateImageKHR failed` repeatedly appearing in the command line.


#
Steps to reproduce:
1. enable kernel modules, set parameters etc.
2. create vgpu
     `echo "$GVT_GUID" > "/sys/devices/pci0000:00/0000:00:02.0/mdev_supported_types/i915-GVTg_V4_2/create"`
3. launch VM
4. wait

Instructions (a small part of which I wrote by trial and error) for the setup are on the [Arch Wiki](https://wiki.archlinux.org/title/Intel_GVT-g).

#
Additional information:
Windows is installed directly to a second SSD, I dual-boot it.  
I've been using this exact VM, from libvirt, for almost two years.  
relevant sections:
```
    <hostdev mode="subsystem" type="mdev" managed="no" model="vfio-pci" display="off">
      <source>
        <address uuid="$GVT_GUID"/>
      </source>
    </hostdev>
  </devices>
  <qemu:commandline>
    <qemu:arg value="-display"/>
    <qemu:arg value="gtk,gl=on,zoom-to-fit=off"/>
    <qemu:env name="DISPLAY" value=":0.0"/>
  </qemu:commandline>
  <qemu:override>
    <qemu:device alias="hostdev0">
      <qemu:frontend>
        <qemu:property name="x-igd-opregion" type="bool" value="true"/>
        <qemu:property name="driver" type="string" value="vfio-pci-nohotplug"/>
        <qemu:property name="ramfb" type="bool" value="true"/>
        <qemu:property name="display" type="string" value="on"/>
        <qemu:property name="romfile" type="string" value="/home/user/VM/vbios_gvt_uefi.rom"/>
      </qemu:frontend>
    </qemu:device>
  </qemu:override>
```

The patched vBIOS necessary to use DMA-BUF with OVMF is linked there too, but its [successors](https://github.com/patmagauran/i915ovmfPkg) doesn't work either.

#