UTM dynamic resolution fix (workaround)

README.MD

Steps

1. mkdir /opt/utm-resolution-fix/
2. cp watch-and-fix.sh /opt/utm-resolution-fix/watch-and-fix.sh
3. chmod +x /opt/utm-resolution-fix/watch-and-fix.sh
4. cp utm-resolution-fix.service /etc/systemd/user/utm-resolution-fix.service
5. systemctl --user daemon-reload
6. systemctl --user enable --now utm-resolution-fix.service

Now, resizing the UTM window should actually resize the guest automatically.

utm-resolution-fix.service

[Unit]
Description=Watch for SPICE errors and resize display

[Service]
Type=simple
Restart=always
RestartSec=1
Environment=DISPLAY=:0
ExecStart=/opt/utm-resolution-fix/watch-and-fix.sh

[Install]
WantedBy=default.target

watch-and-fix.sh

#!/usr/bin/env bash

journalctl -fu spice-vdagentd -g 'invalid message size for VDAgentMonitorsConfig' -n0 |\
while read line; do
	echo "window changed, resizing"
	xrandr --output Virtual-1 --auto
done