When I close my laptop, after a few hours it decides to turn off the network.
If I leave it open and the screen is powered off, it decides to turn off the network. That would be fine if I weren't using it, but I do log into it from my desktop, not least to sync files. It only started doing this a few months ago. Is this a Debian thing, a KDE thing, or something else? Is there something I can do about it?

