Debian Wheezy - system boots into dark screen
I am new to Linux and learning as I go along. I am running Debian Wheezy on a Lenovo 410, 64 bit, dual boot with windows 7. The system had been working fine, however, after a recent update the system boots into a dark screen. I have to press the power button which puts the system in sleep mode. Pressing the power button again the system displays the desktop just fine. The desktop manager is Gnome 3.