Eric Hattemer wrote:
Also, are you using the drivers that come with Xorg, or the ones from ATi's website?I wouldn't give up on the current graphics card just yet. If you tell Xorg to try 1920, does it give an error? You might have to go old-school and use a modeline, but if ATi says it works, then it's Xorg that's being the problem. Maybe you could send or post your xorg.confand Xorg.log.
-Eric Hattemer