Previously, it was not possible to send an non-maskable interrupt (NMI) to a non-responsive guest operating system.
In this release, users can send an NMI via the Cockpit. A new menu option called "Send Non-Maskable Interrupt" was added to the "Shut Down" menu that is available from the Virtual Machines tab. It sends a 'virsh inject-nmi' command to the required virtual machine, and it is sent regardless of the virtual machine's state and without checking the type of operating system or its settings.
In the event of an operation system that is not installed or configured correctly, no action will be taken.