I kept getting a blue screen saying that my display driver is not responding so I updated my display driver and now when the computer goes to sleep I can't get it to wake back up. All I have is the black screen and moving my mouse or touching the keyboard does nothing to make the display come back on. I have to hold the power button down to restart the computer. I have a Toshiba L505 and the display driver that I updated was the AMD M880G with ATI Mobility Radeon HD 4200. It seem to have fixed the display driver error but now I have this problem. How do I fix this?