I have a user with the following problem with his home setup.
He is attaching his MacBook Air to a 27" Thunderbolt display.
He is using a Bluetooth touchpad and USB connected keyboard :
"My new display isn't playing nice with my MacBook air.
When I plug it in and close the lid on my MacBook the picture comes up in a much sharper resolution, which it is supposed to do, but at some point thereafter the display picture breaks up and then the screen goes blank. I have to unplug it, open the MacBook lid, and then plug it back in to get a picture back. I don't seem to have the problem if I leave the lid open, but I also don't get the nice resolution either.
Could this be a video card issue with the MacBook?"
Let me know what you think the problem could be.