How to Fix a Stuck Virtual Machine in Proxmox VE When Shutdown Fails

Recently, I encountered a VM that became unresponsive. The server was unreachable, and I could not access it through PVE VNC. Attempts to shut down or restart the VM via the PVE interface yielded no response, and the following error appeared:

TASK ERROR: VM quit/powerdown failed - got timeout

Solution

First, use the ps command to locate the process corresponding to the VM:

# Replace 101 with your own VM ID
ps -ef | grep "/usr/bin/kvm -id 101" | grep -v grep

In this case, the process ID found was 20582.

Terminate this process:

kill 20582

Return to the PVE interface, and you will see that VM 101 has stopped.

You can now restart the VM either through the PVE interface or by using the following command:

# Replace 101 with your own VM ID
qm start 101

The issue is resolved, although the root cause remains undetermined.