I recently upgraded from vista x32 to Windows 7x64. After the instilation i noticed that my HDTV a 40' Soniq would no longer display at 1920x1080 and was stuck at 1680x1050 as the maximum resolution. However it was displaying the 1080p resolution fine when i was using it on windows vista. After further proding and some help from flyinfinni I have discovered that my screen is only displaying 16:10 resolutions and not 16:9 (it is a 16:9 tv). If anyone knows how to change the resolution back via windows that would be super
Maybe if you try the control panel>display>adjust resolution. Try the resolutions first and if it doesn't show 1080p, maybe detect your resolutions?
I don't know my way around CCC so I couldn't help you there. It might be driver issues as well, you could update them to see if that changes anything.