Fix for Samsung Monitor not working after 10.6 install

This quick fix solution worked for me. Hope it works for you:
I have an 15inch MacBook Pro that I've just installed Snow Leopard 10.6.3 on.
Prior to this install, I've had it hooked up to my Samsung SyncMaster 2243 via an Apple MDP/VGA adapter and a third party VGA cable. It has been flashing on and off a black screen every now and then for the past 2 years and I googled that it was just a crappy communication between the MBP and the Samsung... but now since installing 10.6.3, the Samsung display just flashes the desktop for a second then turns black for good - occationally flashing analogue/digtal prompt display. Tried everything for hours. Nothing worked, thought I was gonna have to buy a new all Apple VGA lead then came across this solution. Tried it and it worked IMMEDIATLY!!! And the monitor doesn't flash black anymore AT ALL!
WHAT TO DO TO FIX:
Go to => System Preferences  => Energy Saver => change graphic settings to Higher Performace.
Cheers!!

I figured it out.  NVIDIA has an update specifically for 10.6.8 and several of their video GPU's.  go HERE to download the driver. It also took away the slow response and flicker I was experiencing.
Here is the update info:
CUDA  Application Support:
  In order to run Mac OS X Applications that leverage the CUDA architecture of  the Quadro 4000 for Mac product, users will need to download and install the CUDA 4.x driver  for Mac located here.
New in Release 256.02.25f01:
This driver update is required if upgrading to the  latest Mac OS X v10.6.8.
Contains performance improvements for a wide range  of applications
Contains fixes for several corruption and crash  bugs, including issues with Autodesk Mudbox, and World of Warcraft.
Contains support for display rotation.
Adds Driver Archive/Restore Functionality.

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