Issue: VM cannot be stopped immediately. Neither “shut down” nor “stop” works.

Reason: This is usually because the “shutdown” command has failed and continues to exist as a process. This blocks other commands, such as the “stop” command.

Solution: Therefore, the failed process must be killed with the following commands. The VM then accepts the “stop” command.

How To:

  • On Proxmox Shell type following commands
  • ps aux | grep # will show you the kvm process ID running your VMID
  • kill -9 # you can now kill it with the process ID

Sources:

https://forum.proxmox.com/threads/cant-shutdown-stop-vm.121754

https://forum.proxmox.com/threads/stop-vm-impossible.101736

https://bugzilla.proxmox.com/show_bug.cgi?id=4474