It's a Mobile Intel 915GB/GMS,910GML Express Chipset family card, according the device manager. It is in a HP6120 laptop. I had already tried the extend my desktop checkbox, but I couldn't even see the mouse on the TV when I scrolled off of the laptop screen, and the TV never flickered or did anything to demonstrate that it was in use as a second display.
Were you able to see a mouse on the second screen before dragging something over if you just brought the mouse arrow there? I would think that you could.
