Have you tried one of these drivers: http://www.intel.com/support/graphics/sb/CS-030193.htm ?
The issue interest me a lot, as I'm planning to buy a 27" LG with 1920x1080, but have no wish to buy a new laptop instead of my MSI PR300 running on GMA X3100 and Win7.
Cheers for the link!
Just tried the Win7 x64 one and it hasn't made any difference unfortunately. I'm going to play around a bit more with it though, so I'll let you know how I get on. Poked the registry with DTD Calculator when I was trying to sort this problem last, so perhaps that's had some kind of adverse effect on this new driver.
I'll see what happens with a clean install when I get the time...