Hi team, 

I've add a resolution sub-element to vga video device model, and the x attribute is 1920, y attribute is 1080.  Dumped domain xml as follow : 

bash-4.4# virsh list
Authorization not available. Check if polkit service is running or see debug message for more information.
 Id   Name                State
-----------------------------------
 1    proj1_vm-4uaz57bh   running
bash-4.4# virsh dumpxml proj1_vm-4uaz57bh | grep -i -10 vga
Authorization not available. Check if polkit service is running or see debug message for more information.
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <graphics type='vnc' socket='/var/run/kubevirt-private/dfe7d514-63f1-4e97-b642-f93109d5aa2f/virt-vnc'>
      <listen type='socket' socket='/var/run/kubevirt-private/dfe7d514-63f1-4e97-b642-f93109d5aa2f/virt-vnc'/>
    </graphics>
    <audio id='1' type='none'/>
    <video>
      <model type='vga' vram='65536' heads='1' primary='yes'>
        <resolution x='1920' y='1080'/>
      </model>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </video>
    <memballoon model='virtio-non-transitional'>
      <stats period='10'/>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
    </memballoon>

It does work on my ubuntu guest, but it doesn't work on centos / windows guest. Is there any way to solve this problem ?