Train Wreck. How nemo-desktop trashed both my local machine and the LAN

For some time now, I’ve been having problems where the power-save (suspend) feature of my desktop system has failed to put the machine to sleep. In some cases, in fact, the entire machine became black-screen unresponsive. Examination of the system logs indicated that the suspend function was failing to freeze a number of tasks, thereby aborting the suspend. […]