I noticed everytime my dell inspiron 1420 wakes up from sleep the screen will flicker a lot. some times violently. I'm not sure what the problem is. I have disabled tmm but it didn't fix the flickers. Does anyone have a solution? Here's my spec: Dell Inspiron 1420 4GB RAM Intel Core 2 Duo T5750 Nvidia Geforce 8400MS Windows Vista 32bit