qemu

#!/bin/bash

# This script is used as libvirt hook when a qemu virtual machine is started or stopped
# it has to be placed in /etc/libvirt/hooks/, it has to be made executable (chmod +x) and libvirt has to be restarted to load it

# Reasons behind the script
# - I have several virtual machines (VM), running in kvm-qemu on top of my arch-host
# - some of them use the SPICE virtualized graphical output, i.e. using the same video output as the host - in my case HDMI1
# - some others use a VGA-Passthrough on a NVIDIA graphic card and have a direct video output - in my case DisplayPort
# - when I start the NVIDIA machines, my monitor should automatically switch to DisplayPort (and switch to gaming-mode for the gaming VM)
# - when I shutdown these VMs, the monitor should go back to the main input = HDMI1 (and go back to the normal mode)
# - as some VMs take a long time to boot, the change from HDMI1 to DisplayPort should be repeated several times until the input is there

# TODO - not yet solved:
# - pass the monitor's USB to the VM after booting - in this way I could use the "MSI Gaming OSD App" on Windows --> libvirt crashes when calling virsh in a hook (as written in the docs :-) )


#change this variable to your own location of MSIGD
EXEC="/usr/github/MSIGD/msigd"

#change the names of the VMs as needed
if [[ $1 == "win10_games_NVIDIA" ]] || [[ $1 == "win10_VideoEditing_NVIDIA" ]]
then
	if [[ $2 == "started" ]]
	then
		if [[ $1 == "win10_games_NVIDIA" ]]
		then
			eval $EXEC --game_mode fps
		fi
		for in in {1..20}
		do
			CurrentInput=$(eval $EXEC -f input)
			if [[ $CurrentInput != "input : dp" ]]
			then
				eval $EXEC --input dp
			fi
			sleep 1
		done
		#virsh attach-device $1 /etc/libvirt/hooks/monitor-usb.xml
	elif [[ $2 == "release" ]]
	then
		eval $EXEC --input hdmi1
		eval $EXEC --game_mode user
	fi
fi