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I have just instaled virt-manager on Arch Linux, I've gone through all of the steps of creating a VM, but when I click on "Finish" on step 5/5 I get two pop-up dialogs:

Unable to complete install: 'Requested operation is not valid: network 'default' is not active'

Details:

Unable to complete install: 'Requested operation is not valid: network 'default' is not active'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/createvm.py", line 2008, in _do_async_install
    installer.start_install(guest, meter=meter)
  File "/usr/share/virt-manager/virtinst/install/installer.py", line 695, in start_install
    domain = self._create_guest(
  File "/usr/share/virt-manager/virtinst/install/installer.py", line 637, in _create_guest
    domain = self.conn.createXML(initial_xml or final_xml, 0)
  File "/usr/lib/python3.10/site-packages/libvirt.py", line 4408, in createXML
    raise libvirtError('virDomainCreateXML() failed')
libvirt.libvirtError: Requested operation is not valid: network 'default' is not active

and Could not start virtual network 'default': Unable to create bridge virbr0: Package not installed

Details:

Could not start virtual network 'default': Unable to create bridge virbr0: Package not installed

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/device/netlist.py", line 208, in _check_network_is_running
    netobj.start()
  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/network.py", line 69, in start
    self._backend.create()
  File "/usr/lib/python3.10/site-packages/libvirt.py", line 3474, in create
    raise libvirtError('virNetworkCreate() failed')
libvirt.libvirtError: Unable to create bridge virbr0: Package not installed

I saw that is said "package not installed" after virbr0, so I tried: $ sudo pacman -Syu virbr0 - not found $ yay -Syu virbr0 - also not found

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  • Please post the entire list of packages you installed, including those for qemu. I think you missed libvirt. May 15 at 15:48

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