In order to push the battery life of my MBA 11" to the limit, I have (a) set Computer sleep to "Never" and (b) set Display sleep to "1 min". However, when the display goes blank, it immediately puts my MBA into sleep mode. Is this a bug? It is really annoying. Every time I want to type something down, I have to wake up te computer, enter my password (I have passlock enabled for the screensaver) and get going again. I use my MBA alongside my textbook for note taking.