On Wed, Sep 27, 2017 at 06:23:17PM +0800, llilulu wrote: Hi, To get the list of supported video devices in libvirt read the "Video devices" section in libvirt documentation [1]. Only those video devices are supported in libvirt. The only confusing thing with that can be the fact, that "-vga std" is mapped to "-device VGA" and in libvirt it's "vga". Similarly the "-vga vmware" is mapped to "-device vmware-svga" and the name in libvirt is "vmvga". In most cases the best choice is "qxl", but some systems have a bugs in driver for the "qxl" device so if it doesn't work you can change it to "vga". You might be interested in virt-manager, if you install a guest using virt-manager and you tell it what typo of OS you are installing virt-manager tries to configure the best defaults for that OS. For the implementation details, libvirt doesn't use the "-vga" option because you cannot easily configure other parameters using this option. Libvirt uses a -device option to configure video device. To get the list of devices just run "qemu -device ?", there is a section "Display devices", with the version of the qemu in my system I have the following output: Display devices: name "cirrus-vga", bus PCI, desc "Cirrus CLGD 54xx VGA" name "isa-cirrus-vga", bus ISA name "isa-vga", bus ISA name "qxl", bus PCI, desc "Spice QXL GPU (secondary)" name "qxl-vga", bus PCI, desc "Spice QXL GPU (primary, vga compatible)" name "secondary-vga", bus PCI name "sga", bus ISA, desc "Serial Graphics Adapter" name "VGA", bus PCI name "virtio-gpu-pci", bus PCI, alias "virtio-gpu" name "virtio-vga", bus PCI name "vmware-svga", bus PCI Pavel [1] <http://libvirt.org/formatdomain.html#elementsVideo>