I was able to reproduce this in lxc: $ sudo apt-get install libvirt-clients gir1.2-libvirt-glib-1.0 libvirt- daemon-driver-qemu libvirt-daemon-driver-storage-rbd libvirt-daemon- system libvirt-daemon-system-systemd libvirt-glib-1.0-0 libvirt0 python3-libvirt
triage-focal+20.04:~$ virsh domcapabilities error: failed to get emulator capabilities error: invalid argument: unable to find any emulator to serve 'x86_64' architecture And after running `virsh capabilities` and then again `virsh domcapabilities` it shows valid looking output. ** Changed in: libvirt (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867460 Title: [Focal] 'virsh domcapabilities' fails unless 'virsh capabilites' is run first To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1867460/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs