3D acceleration improved, but still no improvement in UI acceleration.

[matthewedwrd]

With GVT-g set up, I am now capable of creating a vGPU using my Intel UHD Graphics 620, passing it through a Windows 11 VM, and getting much better improved graphics for 3D-related applications, such as Shadertoy & Minecraft.
However, the actual speed of UIs doesn't seem to change, as mouse movement is a bit choppy as well as UI movement (i.e laggy Google Chrome UI, laggy windows UI, etc)

I currently use this XML file for my VM, however cannot find out why the UI acceleration isn't working:

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">
  <name>virtify0</name>
  <uuid>be218d97-c35f-46dc-90fd-77d5fe5fb347</uuid>
  <memory unit="KiB">8388608</memory>
  <currentMemory unit="KiB">8388608</currentMemory>
  <vcpu placement="static">4</vcpu>
  <os>
    <type arch="x86_64" machine="pc-i440fx-7.2">hvm</type>
  </os>
  <features>
    <acpi/>
    <apic/>
    <vmport state="off"/>
  </features>
  <cpu mode="host-passthrough" check="none" migratable="on"/>
  <clock offset="utc">
    <timer name="rtc" tickpolicy="catchup"/>
    <timer name="pit" tickpolicy="delay"/>
    <timer name="hpet" present="no"/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</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" discard="unmap"/>
      <source file="/var/lib/libvirt/images/virtify0.qcow2"/>
      <target dev="vda" bus="virtio"/>
      <boot order="1"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x07" function="0x0"/>
    </disk>
    <disk type="file" device="cdrom">
      <driver name="qemu" type="raw"/>
      <source file="/home/matthewmajf/Downloads/Win11_23H2_EnglishInternational_x64v2.iso"/>
      <target dev="hdb" bus="ide"/>
      <readonly/>
      <address type="drive" controller="0" bus="0" target="0" unit="1"/>
    </disk>
    <disk type="file" device="cdrom">
      <driver name="qemu" type="raw"/>
      <source file="/home/matthewmajf/Downloads/virtio-win-0.1.240.iso"/>
      <target dev="hdc" bus="ide"/>
      <readonly/>
      <address type="drive" controller="0" bus="1" target="0" unit="0"/>
    </disk>
    <controller type="usb" index="0" model="ich9-ehci1">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x05" function="0x7"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci1">
      <master startport="0"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x05" function="0x0" multifunction="on"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci2">
      <master startport="2"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x05" function="0x1"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci3">
      <master startport="4"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x05" function="0x2"/>
    </controller>
    <controller type="pci" index="0" model="pci-root"/>
    <controller type="pci" index="1" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="1"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0"/>
    </controller>
    <controller type="pci" index="2" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="2"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x09" function="0x0"/>
    </controller>
    <controller type="pci" index="3" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="3"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0a" function="0x0"/>
    </controller>
    <controller type="pci" index="4" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="4"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0b" function="0x0"/>
    </controller>
    <controller type="pci" index="5" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="5"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0c" function="0x0"/>
    </controller>
    <controller type="pci" index="6" model="pci-bridge">
      <model name="pci-bridge"/>
      <target chassisNr="6"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0d" function="0x0"/>
    </controller>
    <controller type="ide" index="0">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x1"/>
    </controller>
    <controller type="virtio-serial" index="0">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x06" function="0x0"/>
    </controller>
    <interface type="network">
      <mac address="52:54:00:34:4f:bf"/>
      <source network="default"/>
      <model type="virtio"/>
      <link state="up"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" 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="virtio">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0e" function="0x0"/>
    </input>
    <input type="keyboard" bus="virtio">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x0f" function="0x0"/>
    </input>
    <input type="mouse" bus="ps2"/>
    <input type="keyboard" bus="ps2"/>
    <graphics type="spice">
      <listen type="none"/>
      <gl enable="yes" rendernode="/dev/dri/by-path/pci-0000:00:02.0-render"/>
    </graphics>
    <sound model="ich6">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x0"/>
    </sound>
    <audio id="1" type="spice"/>
    <video>
      <model type="none"/>
    </video>
    <hostdev mode="subsystem" type="mdev" managed="no" model="vfio-pci" display="on">
      <source>
        <address uuid="cb33ec6d-ad44-4702-b80f-c176f56afea1"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x06" slot="0x01" function="0x0"/>
    </hostdev>
    <redirdev bus="usb" type="spicevmc">
      <address type="usb" bus="0" port="2"/>
    </redirdev>
    <redirdev bus="usb" type="spicevmc">
      <address type="usb" bus="0" port="3"/>
    </redirdev>
    <memballoon model="virtio">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x08" function="0x0"/>
    </memballoon>
  </devices>
  <qemu:override>
    <qemu:device alias="hostdev0">
      <qemu:frontend>
        <qemu:property name="x-igd-opregion" type="bool" value="true"/>
        <qemu:property name="ramfb" type="bool" value="true"/>
        <qemu:property name="driver" type="string" value="vfio-pci-nohotplug"/>
      </qemu:frontend>
    </qemu:device>
  </qemu:override>
</domain>