Virt-manager Qemu error when trying to open VM

Ubuntu Support Template

Ubuntu Version:
25.10

Desktop Environment (if applicable):
GNOME

Error starting domain: unsupported configuration: spice graphics are not supported with this QEMU

Traceback (most recent call last):
File “/usr/share/virt-manager/virtManager/asyncjob.py”, line 67, in cb_wrapper
callback(asyncjob, *args, **kwargs)
~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/share/virt-manager/virtManager/asyncjob.py”, line 101, in tmpcb
callback(*args, **kwargs)
~~~~~~~~^^^^^^^^^^^^^^^^^
File “/usr/share/virt-manager/virtManager/object/libvirtobject.py”, line 57, in newfn
ret = fn(self, *args, **kwargs)
File “/usr/share/virt-manager/virtManager/object/domain.py”, line 1446, in startup
self._backend.create()
~~~~~~~~~~~~~~~~~~~~^^
File “/usr/lib/python3/dist-packages/libvirt.py”, line 1379, in create
raise libvirtError(‘virDomainCreate() failed’)
libvirt.libvirtError: unsupported configuration: spice graphics are not supported with this QEMU

I have no idea what ‘spice graphics’ is, hopefully you do but your problems are pretty specifically explained in the output you posted. There are several configuration files mentioned in the output and it points to specific lines in each file which are incorrect so they need to be changed. Did you modify those files? If not, you appear to be attempting to do something the software is not capable of.

Hello!

Just as a check, are you able to use VNC graphics?

Select display server in virt-manager as shown:
1 - open settings
2 - current option
3 - select option

I did nothing except install updates on my host OS of which 6 approx were related to qemu. Then the errors started appearing when opening VMs which were running fine previously.
Resolved it by deleting the 4 VMs I had and purging the system of anything to do with virtualization and then setting up virtualization again from scratch.
I have installed two VMs today without errors so just going to move on.
Thanks

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