U2412M flickering problem

I have an XPS 1640 laptop and I have just connected a U2412M monitor via displayport.  The monitor keeps flickering really badly. Sometimes it goes black for about three seconds then just flickers a lot.  Can anyone suggest a fix for this?  I have an ATI Radeon 4670 card in the machine.  I have updated the drivers on both the monitor and the card but it still flickers.  It works fine on VGA but I really want to use a digital connection.

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Re: U2412M flickering problem

Hi Funkula,

Did you ever receive any resolution for this?  I have reported the same problem here:en.community.dell.com/.../19437737.aspx

At first I thought it was the OptiPlex 990 desktop, but now I am certain the DisplayPort input on the monitor is at fault.

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