I have a new Surface Pro. Yesterday, I left it sitting on my desk with a web page open (either Firefox or Edge). When I came back hours later, the machine had gone to sleep. When I awakened it, I got a message that there was no Internet. I don't recall now whether it said anything about airplane mode or I found that out by poking around. In any case, it had gone into airplane mode. When I clicked on the little wi-fi icon and unclicked airplane mode, the Internet was back.
A little searching online revealed several websites indicating that this is a common problem with Win 10 and that it has to do with power-saving settings.This page provides a step-by-step solution to fixing the problem:
But I can't get it to work on my machine. I open the Device Manager and the Network Adapters dialogs, but when I open the Properties dialog, there is no Power Management tab. I also tried going to the general power management applet in Settings, but couldn't find anything there, either.
Can anyone provide any clues as to how to fix this? I don't want it ever going into airplane mode automatically.