I have noticed that every time the Power Management, Power Button option is changed and saved,
the acpid stops but does not restart. Starting the service manually at the command line with "service acpid start", starts the daemon, reading in the OMV updated configs correctly.
I saw that another member in the forum experienced something similar that by restarting his NAS completely activated the new config for the power button.
Please revise the code to ensure the acpid daemon does actually restart on save.
I confirmed this on installations on both a physical box and a VM.
Many thanks
Peter