I got my new ASUS VH238 1920x1080p lcd display today, plugged the HDMI cable into my ion2 netbook and Windows 7 Ultimate. It detected the monitor as a generic uPnP display, and limits the maximum resolution to 1280x720, which is lame.
I've check ASUS's site for drivers, and I've done some general Google'ing but haven't found any answer to how to get WIndows to let me set the resolution to 1920x1080.
The netbook worked fine when I connected it to my 42" 1920x1080 lcd TV, as far as recognizing the display and allowing me to set the resolution appropriately. With the Acer, that wasn't the case.
However, as I mentioned above, I have an ION2 in the netbook, and the NVIDIA control application let me set the resolution to 1920x1080p. It's working great now, though for some reason I don't have HMDI audio as a playerback option. That also worked fine on the LCD TV. I'll figure it out, eventually.
The netbook is an ASUS EE PC 1015PN, it does light gaming and 1080p video fine. Netbooks have come a long long way but still have some problems like slow I/O and heat management. That's off-topic, but though I would mention it.
I figured out the HD Audio..the HDMI cable's that I bought off of AMazon.com was somehow the issue. I replaced it with a cable from Microcenter, and the recognized my monitor as an Ancor Comm display with HD audio capability.