I have now managed to get the resolution I needed, 1920x1080, by editing
the Video Virtio XML file to the following content using the virt-
manager Details tab.
<video>
<model type="virtio" heads="1" primary="yes">
<resolution x="1920" y="1080"/>
</model>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0"/>
</video>
Last time I tried to get this working the resolution appeared OK until I
restarted then gave me unfilled bars top and bottom of the display even
though xrandr showed the full resolution.
So, success for now even though using the Display settings from
xfce4-settings-manager freezes the system if used even when starting
from this full resolution.
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https://bugs.launchpad.net/bugs/2126798
Title:
Can not change screen resolution in Xubuntu-25.10-beta running in
KVM/QEMU
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