I have a Dell Studio 1749 with an ATI Mobility Radeon HD 5650 Graphics card.
I've just purchased a Dell U2713HM Monitor. I need to connect them Displayport > Displayport in order to acheive the monitor's maximum resolution of 2560 x 1440 (I can't use VGA or HDMI because these cables don't have enough bandwidth to support that resolution... and the laptop doesn't have a DVI port)
When I plug the monitor Displayport cable in, it all works fine and displays at the full resolution for about 5 seconds, then the laptop freezes. Initially it just won't let me click on anything (neither using the touchpad buttons or with a mouse) and then another 5 seconds later the pointer freezes too
As soon as I unplug the Displayport cable, it unfreezes and goes back to normal
I've downloaded and installed the latest graphics card & monitor drivers.
Any advice greatly appreciated