device: 0.935
graphic: 0.856
socket: 0.777
debug: 0.670
vnc: 0.596
boot: 0.593
semantic: 0.510
network: 0.504
performance: 0.422
PID: 0.290
KVM: 0.267
files: 0.231
other: 0.202
permissions: 0.154

Invalid DRM modifier in ScanoutDMABUF call
Description of problem:
`modifier` parameter in `ScanoutDMABUF` callback is always `0xffffffffffffff` (`DRM_FORMAT_RESERVED`)
Steps to reproduce:
1. Run QEMU with D-Bus display
2. Connect D-Bus display client and print modifier
Additional information: