We operate the machine with tigervnc-1.9.0-150100.19.20.1.x86_64 on opensuse Leap 15.3 The host is a server with Univention UCS 4.4.9 based on Debian 9 stretch Package: qemu-system Architecture: amd64 Version: 1:2.8+dfsg-6+deb9u18A~4.4.9.202210200653 libvirt-daemon-system/ucs449,now 3.0.0-4+deb9u5A~4.4.8.202203291813 amd64 libvirt-clients/ucs449,now 3.0.0-4+deb9u5A~4.4.8.202203291813 amd64 It is KVM, yes.