Comment 4 for bug 1911848

Performing verification for Focal.

I installed 5.4.0-65-generic to a c5.metal AWS machine, and installed ubuntu-desktop and a KVM stack. I install xrdp and verified I could reach the VMs desktop.

I installed virt-manager, and configured the Windows 2k19 VM in accordance with the testcase section, carefully making sure the Cascadelake-Server-noTSX processor is selected and the features in place.

I installed Windows, and installed the virtio drivers. From there I enabled Hyper-V and restarted.

The machine got stuck during reboot, after the hyper-v feature had installed and configured. Looking at the performance tab, the machine is stuck at 100% CPU, see 5.4.0-65-generic.png attached.

I then enabled -proposed and installed 5.4.0-66-generic, and kexec rebooted. From there I started the windows VM, which came up properly to the desktop. Looking at the performance tab, CPU usage is low, and is what is expected. See 5.4.0-66-generic.png attached.

The 5.4.0-66-generic kernel fixes the issue, happy to mark as verified.