Install the Power Button Package in Synology DSM and disable the qemu agent option in PVE.

Where to Download the Power Button Package

• Note that DSM 6.1 and DSM 6.2 use different spk packages

https://ftp.myds.cloud/XPenology%E9%BB%91%E7%BE%A4%E6%99%96/PowerButton/POWERBUTTON_6.2-0002.SPK https://ftp.myds.cloud/XPenology%E9%BB%91%E7%BE%A4%E6%99%96/PowerButton/POWERBUTTON_6.1-0005.SPK

Or use the download service provided by this site: Download service

References: https://koolshare.cn/thread-165631-1-1.html https://ftp.myds.cloud