Same here !! It not working on DSM 7.2.2-72806 Update 1
I can fix it with below step:
- Uninstall package
- Reinstall package
- SSH to DSM and run command (It not running at this step)
sudo sed -i 's/package/root/g' /var/packages/qemu-ga/conf/privilege
- Reboot DSM (COnfirm on proxmox QEMU Guest agent is enabled)
- Final, it working.
+ on DMS you can see package is running
+ on promox you can see DSM IP addess displayed
Good luck !!!