I am unable to change the display for a Fedora 24 Workstation using Gnome 3.20 from its default 1024 x 768. I, also, tried a number of spins but the behavior persist. Installing on a physical desktop does not reproduce the symptom. Installing CentOS 7 does not reproduce the symptom. Under the virtual machine "Applications" it shows: kernel-4.7.4-200.fc24 ovirt-guest-agent-common-1.0.12-3.fc24 xorg-x11-drv-qxl-0.1.4-7.fc24