I probably had asked this question before, but I had no proper solution and probably, the thread seems to be obsolete. I use internet with Ethernet (the drivers are downloaded from my hardware manufacturer, Realtek, and I have also tried the one that came bundled with Debian 8.1). However, I found my ethernet connection missing (reports cable unplugged in gnome-settings), after the system wakes from sleep. Need a fix!
-- Himanshu Shekhar IIIT-Allahabad IRM2015006