KVM Fails 3D Acceleration on Debian (failed to validate against schema)

[bo0od--- via Users <users@xxxxxxxxxxxxxxxxx>]

Full VM xml: 

```
<domain type='kvm'>
  <name>Whonix-Gateway</name>
  <uuid>c011d3d3-8383-47a8-b2cd-d54f883d8af1</uuid>
  <genid>bc5b233c-46ea-4bfb-ad99-00f1165a09e6</genid>
  <description>Do not change any settings if you do not understand the consequences! Learn more: https://www.whonix.org/wiki/KVM#XML_Settings</description>
  <memory dumpCore='off' unit='KiB'>1250000</memory>
  <currentMemory unit='KiB'>1250000</currentMemory>
  <blkiotune>
    <weight>250</weight>
  </blkiotune>
  <memoryBacking>
    <nosharepages/>
    <allocation mode='ondemand'/>
    <discard/>
  </memoryBacking>
  <vcpu placement='static' cpuset='0'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-q35-9.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <hap state='on'/>
    <pvspinlock state='on'/>
    <pmu state='off'/>
    <vmport state='off'/>
  </features>
  <cpu mode='host-passthrough' check='none' migratable='on'/>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup' track='guest'/>
    <timer name='kvmclock' present='yes'/>
    <timer name='pit' present='no'/>
    <timer name='hpet' present='no'/>
    <timer name='hypervclock' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/Whonix-Gateway.qcow2'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
    </disk>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
    </controller>
    <controller type='usb' index='0' model='qemu-xhci'>
      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
    </controller>
    <controller type='sata' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'/>
    <controller type='pci' index='1' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='1' port='0x10'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
    </controller>
    <controller type='pci' index='2' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='2' port='0x11'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
    </controller>
    <controller type='pci' index='3' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='3' port='0x12'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
    </controller>
    <controller type='pci' index='4' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='4' port='0x13'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
    </controller>
    <controller type='pci' index='5' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='5' port='0x14'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
    </controller>
    <controller type='pci' index='6' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='6' port='0x15'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
    </controller>
    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0x16'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:c1:95:49'/>
      <source network='Whonix-External'/>
      <model type='virtio'/>
      <driver name='qemu'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
    <interface type='network'>
      <mac address='52:54:00:bf:80:2e'/>
      <source network='Whonix-Internal'/>
      <model type='virtio'/>
      <driver name='qemu'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='spice' autoport='yes'>
      <listen type='address'/>
      <clipboard copypaste='no'/>
      <filetransfer enable='no'/>
      <gl enable='yes'/>
    </graphics>
    <audio id='1' type='spice'/>
    <video>
      <model type='virtio' heads='1' primary='yes'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
      <acceleration accel3d='yes' accel2d='yes'/>
      <gl enable='yes'/>
    </video>
    <watchdog model='itco' action='reset'/>
    <memballoon model='none'/>
    <rng model='virtio'>
      <rate bytes='1024' period='1000'/>
      <backend model='random'>/dev/random</backend>
      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
    </rng>
  </devices>
</domain>
```

But it will always show:

```
error: XML document failed to validate against schema: Unable to validate doc against /usr/share/libvirt/schemas/domain.rng
Extra element devices in interleave
Element domain failed to validate content
```

Any idea how to resolve this?