Same problem here with an Acer AL2016W and ATI 3450. Running either the beta Catalyst drivers
from ATI, or the in-the-box driver
from Microsoft will only get me up to 1600x1200, not a widescreen resolution. My monitor's native is 1680x1050 and works fine in that resolution in XP, Vista, and Ubuntu. Trying to get this going on the 7000 build.
If I go into advanced settings I can find a list all modes option and manually select the 1680x1050 option, but 7 will set the resolution to 1400x1050 no matter what I select.
For now I'm running in the next 16:10 resolution down (1440x900) but I'd really like to be able to run in the native resolution, like EVERY OTHER operating system will let me.
Ok figured out a band-aid of a solution. I installed the beta catalyst (driver and control center), installed the driver for my monitor from XP (from Acer), and then installed the catalyst driver for vista (driver only). Then right-clicking on the control center icon in the notification area, selecting "set desktop area to" (bypassing 7's resolution screen) finally did the trick. It should not be this difficult...