I cannot get Ubuntu Desktop 20.04 to run as a VM on UnRaid 6.8.3. Every time I create a new VM and load up the .iso, the CPU goes to 100% and the VM doesn't boot to desktop. This also happens when you try to upgrade to Ubuntu Desktop 20.04 from 19.10. When you upgrade you will get a blank screen on VNC and CPU will be 100%.
This only seems to affect Ubuntu Desktop as Ubuntu Server 20.04 loads up fine.