Hacky script to support automatic screen resize with virt-manager VMs with arbitrary window manager (see https://bugzilla.redhat.com/show_bug.cgi?id=1352226 for details )

spiceresize.sh

#! /bin/bash

if ! pgrep -u $(whoami) spice-vdagent; then
	echo "Starting vdagent"
	spice-vdagent
fi

INTERVAL=1

while true; do
	# No multiple outputs supported
	outname=$(xrandr | grep "^Virtual-" | head -n1 | cut -d' ' -f1)
	if xrandr | grep "$outname" -A1 | tail -n1 | grep -vq '\*'; then
		echo "Resizing..."
		xrandr --output "$outname" --auto
	fi
	sleep $INTERVAL
done