I just setup a new system with an ATI HD5450. I have the latest drivers installed from ATI's website. The OS is Win 7 x64. I have 2 displays, and Asus 19" LCD (main - DVI) and a Polaroid HDTV 19" (2nd - HDMI). With my last system I was able to run both displays at 1440x900 without any problems and everything would fit perfectly with no sizing issues. Now with the freshly built system they are both set to 1440x900 (according to both windows and catalyst) but on the HDTV when I maximize a window it goes larger than the screen. Is there something that I am missing or is it possible the ATI drivers are not good and I should try an earlier driver?
Ok, I plugged in a d-sub15 cable and it works at 1440x900... Maybe there is something wrong with the HDMI output on the card
My JVC LCOS TV was 1080 but would not display 1080 from the computer input. Just got a blank screen. Second output worked fine on another computer monitor. TV manual stated that through that input TV only supported 800 lines. Video card was not the problem, TV was. Reset that second output to a lower resolution and try again.
Check your TV owners manual, you may have run into the same issue that I had.