QEMU shutdown script can be simplified drastically?

[podocarp]

The QEMU shutdown script tries to send ctrl alt del. But this doesn't work if the VM doesn't have a keyboard attached, which is most of the time. Is there a particular reason it's done like this? Can I suggest changing it to just

    {"execute":"system_powerdown"}

which I've tested and works.

[astro]

Does that work in both the -M q35 and -M microvm cases?

[podocarp]

I've not tested on q35, I will investigate. Just tested on x86-linux with qemu which defaults to -M microvm,.... However this is an ACPI shutdown so it only works when the guest has finished starting up. Opened a PR for this, maybe we can move discussion there #381