I never had this problem before the ICS update, but now when I go to bed at night, I'm connected to my home's wifi network, but when I wake up the next morning, I'm no longer connected and wifi is off. I've looked everywhere I can think of, but is there a setting that turns off wifi after so many idle minutes or is it part of a power-saving feature? If so, I can't seem to find it anywhere. I have no problems connecting, it's just staying connected overnight. I just don't want wifi to turn off and then any updates using my wireless data. I have unlimited now, but I'd prefer it to just stay on. Any ideas on where I can check?