I have a 1900x1080 resolution monitor, and after installing Fedora to create a dual boot machine, the maximum resolution Fedora 14 (previously only Windows 7 was installed) can achieve is 1280x1024. Why is this the case? How do I figure out what to do to get full native resolution on my monitor in Fedora?
Installed Fedora in dual boot Windows desktop. Now I can't get full monitor resolution with my AMD Radeon HD 6450
linux;fedora;xorg;radeon
So, this appears to be a really new graphics card. You'll need both an up-to-date X driver and a really recent kernel  in fact, you need the not-yet-released (as of early March 2011) 2.6.38 kernel. (See this article for more on the upcoming kernel release.)The good news is that the pre-release 2.6.38 kernel is already in the tree for Fedora 15, and the Fedora 15 Alpha release is scheduled for tomorrow today (March 8th, 2011). Get the release from http://torrent.fedoraproject.org/.I can't promise that that'll make the card work, but the signs look positive. I'm not sure if the needed driver code is in the F15 X.org drivers yet, but the quickest way to find out is to try it.You can even get the Live Desktop CD option, which will let you test if it works without even reinstalling.It's possible (likely even) that the required bits will make it into Fedora 14 in a few months. So just waiting is another option.(Honestly, I think either of those will be a better option than the proprietary binary driver. I've had no end of trouble from that. It's faster at 3D, so if top 3D performance is your main need, it might be worth it, but for general use, eh.)Update: So, Fedora 15 (final release) is out today. I'm curious  did it work?