As of an earlier posting, I had “Dropbox” v3.16.1 running on my KDE-4 Linux desktop. This version has updated itself to v3.18.1 . Additionally, I have this Dropbox client installed and idling, on the Linux laptop I name ‘Klystron’.
I see one significant new behavior. When I have left my laptop idle, with the screen turning off, the little Dropbox icon changes to show that it has dropped its connection to the Dropbox server. This is similar to behavior which my “Pidgin” IRC client has shown, and seems to suggest, that there are power-saving measures in place on up-to-date Linux desktop managers, which certain applications may opt to use.
The ‘KDE’ desktop manager has in common with ‘GNOME’, that both now use ‘DBUS’ as their inter-process communication system. So what works under GNOME, will frequently also work under KDE when properly set up.
But the fact that both Pidgin and Dropbox seem to do this on my laptop, means that I do not have to keep looking as hard as before, for causes within the kernel module of my laptop WiFi, for possible connection issues. In both cases, the software seems to reconnect to its server, as soon as I have unlocked my screensaver.
Unlocking the screensaver is an event, which a kernel module usually does not recognize.
(Edit 04/17/2016 : ) One way in which such a power-saving mode would make sense however, is that the Kernel can recognize it, and can give the software command to the Kernel Module, to turn off its antenna as well. However, according to This Posting, I have forbidden the KM from following such a command, such that the antenna does not switch off.
Depending on what software we have installed, simply having the WiFi turn off, can cause problems.