I've got a dell xps 1330 with Intel WiFi card.
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
The problem is that if I want to leave my notebook to download something big, I need to make some activity. Move mouse, use keyboard for example. Even if it works on circuit power.
Some time after screen turns blank (30 min) WiFi freezes. All connections aren't lost, but downloads are stopped. Hibernation is not allowed in power settings.
I've tried searching about this problem, but didn't find anything similar.
I hope you may help me to solve this puzzle.
p.s. Sorry for my bad English.